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A Question In My Summer Homework Said

"Tamara wraps 12 gift boxes in red paper and 8 gift boxes in blue paper. She puts a CD in 8 of the red boxes and 2 of the blue boxes. What is the probability of picking a box with a CD if a person randomly chooses a gift box?"

The Third part of The Question Says,

"Write the formula for probability in words. Then substitute numbers for the probability and simplify."

I Don't Understand What It Means By 'The Formula For Probability'.

If You Can Help Me I Would Be Very Grateful, If You Can't I Thank For At Least Trying To.

"Tamara wraps 12 gift boxes in red paper and 8 gift boxes in blue paper."

12 + 8 = 20 boxes in all

"She puts a CD in 8 of the red boxes and 2 of the blue boxes."

10 of the boxes contain a CD

"What is the probability of picking a box with a CD if a person randomly chooses a gift box?"

probability of picking a CD box = (number of CD boxes)/(total number of boxes)

probability = 10/20 = 50%

Please verify the logic! I have had very little instruction in stats.

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I can answer questions in Algebra, Basic Math, Calculus, Differential Equations, Geometry, Number Theory, and Word Problems. I would not feel comfortable answering questions in Probability and Statistics or Topology because I have not studied these in depth.

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