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Hello:

Ratios can indicate division. For example, 3/4 or (3:4) indicates 3 divided by 4 equals 0.75.

It also has a different meaning that does not necessarily indicate division. For example, the ratio of boys to girls is 3 to 4 (3:4) what meaning does this ratio have?

I thank you for your reply.

This is good question and you're right that the meaning of "ratio" is somewhat different for the 2 cases.

For the ratio of boys to girls, it means that there 3 boys for every 4 girls (not a bad ratio!). This implies that a basic collection consisting of both sexes would be 7 = 3 + 4 so that the proportion of boys in a population would be 3/7 = 0.43 for boys and 4/7 = 0.57 for girls.

Thus, if you had a large group of boys and girls, say N, the number of boys would be (0.43)N and (0.57)N for girls.

Hope this makes sense.

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