| Subject | Date Asked | Expert |
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| Probablity | 3/13/2008 | Surajit Basu |
Q: A drawer contains 50 bolts and 150 nuts. Half of the bolts and half of the nuts are rusted. If one ...
A: Let's try a new question. A Drawer contains 2 bolts and 3 nuts. If you pick an item, what is the ...
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| Quantitative Analysis For Managerial Applications | 3/12/2008 | Surajit Basu |
Q: A Drawer contains 5o bolts and 150 nuts.Half of the nuts are rusted,If one item is chosen at ...
A: Let's try a new question. A Drawer contains 2 bolts and 3 nuts. If you pick an item, what is the ...
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| Probability Question | 3/6/2008 | Soroban |
Q: Urgent Request: Please help me with the following prob/stat question. Your brother is color blind ...
A: Heloo, Naina! This is a classic "trick question". The numbers of socks is meant to be a ...
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| Math Quesion | 3/4/2008 | Soroban |
Q: Need help on the following math question My sister is color blind and since she has 4 different ...
A: Nisha! This is a classic "trick question". The numbers of colored socks are meant to be a ...
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| birthdays | 2/27/2008 | Surajit Basu |
Q: I am looking to find out statistically how many people you would have to speak to in the street ...
A: I assume when you say birthday, you mean date and month. ( not year). There are 365 such days ( or ...
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| probablity | 2/24/2008 | Soroban |
Q: A state lottery is designed so that a player chooses six numbers from 1 to 30 on one lottery ticket. ...
A: Baron! Choosing 6 numbers from 30, there are: C(30,6) = 593,775 possible sets of six ...
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| Proability Question | 2/24/2008 | Surajit Basu |
Q: A certain airplane has two independent alternators to provide electrical power. The probability that ...
A: The chance of the first failing is 0.02. The chance of the second failing is 0.02. Both failing ...
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| please help me solve this problem! | 2/14/2008 | Soroban |
Q: A toy manufacturer observes that a defect occurs with 3% of a particular part.If 6 parts are used on ...
A: Naveen! This is a Binomial Probability problem. I hope you're familiar with the formula. ...
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| probability | 2/12/2008 | Soroban |
Q: There are 3 colored balls in the basket. These are blue, green, and red balls. If I'm blindfolded ...
A: Hans! The situation is "at least one blue ball." This means: 1 blue or 2 blue or 3 blue or 4 blue. ...
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| math | 2/12/2008 | Surajit Basu |
Q: A society decides to raise funds by running a lottery.Every week 3 numbers are drawn from 20 ...
A: sounds a bit like homework. so i am going to give you hints; if you need more, write to me at ...
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| math | 2/12/2008 | Soroban |
Q: A society decides to raise funds by running a lottery.Every week 3 numbers are drawn from 20 ...
A: Fawad! There are: C(20,3) = 1140 possible ways to draw three numbers. There is exactly one (1) ...
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| math | 2/11/2008 | Surajit Basu |
Q: A society decides to raise funds by running a lottery.Every week 3 numbers are drawn from 20 ...
A: Sorry for the delay; I skipped this email. How many combinations are there? The first number can be ...
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| Are Independent and Dependent Variables interchangeable | 2/9/2008 | Ellis Godard |
Q: Realizing Dependent Variables are a "cause" of the Independent Variable...could their be a scenario ...
A: No, and yes. The dependent variable is the "effect", and the independent variable is the "cause". ...
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| probability | 2/8/2008 | Soroban |
Q: There are 3 colored balls in the basket. These are blue, green, and red balls. If I'm blindfolded ...
A: Hans! >> There are 3 colored balls in the basket. >> These are blue, green, and red balls. >> If ...
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| cards 52 | 2/6/2008 | Soroban |
Q: Use the mutipilcation principle to tell the total number of three-card hands (premutations) that can ...
A: We have 52 cards in a standard deck. We want three cards of which exactly two are Aces. [These ...
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| Maths | 2/3/2008 | Soroban |
Q: these are a few questions (Permutations) I have attempted.Could you please guide me if I am going ...
A: Jon! Sorry, your answers are wrong. These are quite tricky; they take a lot of reasoning. >> 1. ...
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| Texas hold em | 2/3/2008 | Soroban |
Q: I have an other problem, I hope you can help me with. I shall calculate the probability of ...
A: Thomas! I don't know the rules for "Texas Hold'em". But I can help you with simple probabilities. ...
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| probability | 1/30/2008 | Surajit Basu |
Q: Martha is a flight attendant stationed in Denver. Her assignments are rotated randomly between ...
A: Her assignments are rotated randomly between flights to Dallas; Seattle; Portland, Boise, and Las ...
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| Company Drawing | 1/28/2008 | Soroban |
Q: Soroban, I have a stat related question. There are 3 different drawings that our company does. ...
A: Barrett! An interesting comparison . . . I believe the two drawings are equivalent. In the ...
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| Probability Tree Diagram! HELP! | 1/16/2008 | Soroban |
Q: Durobond is a manufacturer of inexpensive furniture, such as bookcases, tables, etc. Their products ...
A: Sarah! I wish I could type the tree diagram for you, but the characters don't line-up nicely. I ...
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| Probability | 1/13/2008 | Soroban |
Q: Male Female Total Hired 40 80 120 Not Hired 360 ...
A: Sarah! What statistical TEST are you using? Inspecting the data, there are some obvious facts. ...
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| Probability of a word sequence | 1/10/2008 | Surajit Basu |
Q: Pls tell me how to find the probability of a particular word appearing when we arrange all 26 ...
A: It depends on the length of the word. The first letter has be the exact one, e.g. M, so the chance ...
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| Attitude score | 1/7/2008 | Ellis Godard |
Q: I need some statistics help. Ive done the two way sort on the below data. I need to know the ...
A: It's almost impossible to tell, without information on what Q6bis Q7bis Q3bis Q8bis Q1bis Q2bis ...
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| probability | 1/6/2008 | Soroban |
Q: Alana has a probability of 0.8 for admission. Barry has a probability of 0.6 for admission. Cyndi ...
A: Blair! >> Alana has a probability of 0.8 for admission. >> Barry has a probability of 0.6 for ...
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| Neighbors named "Norm" | 1/1/2008 | Ellis Godard |
Q: Godard: As with your first name, mine is not a common one. Interestingly, my new neighbor is also ...
A: LOL. As my profile says, combinatorial math is beyond my area of expertise - but since this one's ...
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| precal | 12/30/2007 | Soroban |
Q: a spinner is used for which it is equally probable that the pointer will land on any one of six ...
A: Chyjuan! >> Find the derivative of f(x) at x. >> That is, find f '(x). >> f(x) = x^3 + ...
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| probability | 12/28/2007 | Surajit Basu |
Q: I have tried many times to answer this question and still am not getting it right. Can you please ...
A: dont be math phobic.its quite simple the probability is The number of acceptable combinations/ The ...
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| probability | 12/27/2007 | Soroban |
Q: Given two six sided dice, compute the probability of rolling a nine.
A: PJ! There are no neat formulas for a pair of dice. We must list (or visualize) the possible ...
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| Random pairing | 12/19/2007 | Soroban |
Q: There are two sets X and Y of balls, from each of them is chosen a ball. Set X contains 5 big ...
A: Galina! This is not a simple problem, but I'll try to explain it. Suppose we draw the five ...
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| premutations | 12/18/2007 | Surajit Basu |
Q: you want to take a photograph at night. camera allows for 10s in half-second increments, and the ...
A: oops, i just realized that the answer went blank! the question is a bit confusing, i am not a ...
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| comparison of unequal sample sizes | 12/17/2007 | David Moran |
Q: I want to compare group means (test score) of the two groups with extremely different sample size ...
A: I have to be honest with you. I've only had one statistics course in college and I don't remember ...
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| probability | 12/16/2007 | Soroban |
Q: I am looking for the derivation and solution of the following problem: assume that you have ...
A: Celeste! To get 3 Jacks, there are four ways. There are 4 Jacks; we will select 3 of them. ...
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| probability | 12/15/2007 | Soroban |
Q: assume a standard deck of 52 cards. Select a card from the deck. do NOT replace the card. Select ...
A: Celeste! Does the question mean "a red 3 and a face card" IN THAT ORDER? Or do they mean in ...
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| probability | 12/14/2007 | Surajit Basu |
Q: There are 2 defective light bulbs in a box of 10. If 3 light bulbs are randomly drawn, what is the ...
A: I am not going to solve the full problem, since this looks like homework. We need to find the ...
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| probability | 12/14/2007 | Soroban |
Q: There are 2 defective light bulbs in a box of 10. If 3 light bulbs are randomly drawn, what is the ...
A: Chris! This is a Combination-type problem. There are 10 bulbs, we draw 3 of them. There are: ...
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| P-Value? | 12/14/2007 | Ellis Godard |
Q: How do you find and calculate a p-value? Is there a formula?
A: A p value is associated with a particular test statistic, and there are scores (if not hundreds) of ...
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| probability | 12/13/2007 | Soroban |
Q: a sample of 4 different calculators is randomly selected from a group of calculators containing 11 ...
A: Susie! This is a Combination problem. I use the notation: C(n,r) ... I hope you understand. ...
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| algebra | 12/12/2007 | Soroban |
Q: A bag contains 30 marbles with 18 blue ones and 12 green ones. If you reach into the bag and draw ...
A: Cassie! This is a Combination problem. I use the notation: C(n,r) ... I hope you understand. ...
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| probability | 12/12/2007 | Soroban |
Q: A card is drawn from a standard deck of 52 cards. What is the probability that the card is either ...
A: Cassie! There are 4 two's in a deck. There are 13 hearts in a deck. But we must be careful ... ...
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| Probabilities | 12/11/2007 | Soroban |
Q: If an unknown number of math teachers attend a Christmas party, and all of the math teachers win a ...
A: Deb! We need the Combinations formula: nCr I find it neater to write it like this: C(n,r) ...
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