Two students are randomly selected from a class of 12 girls and 18 boys. a. Find the

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Two students are randomly selected from a class of 12 girls and 18 boys.

a. Find the expected number of girls and the expected number of boys.

b. Write the ratio of the expected number of girls to the expected number of boys in simplified form. What do you notice about this ratio?

c. Calculate the variance of the number of girls selected.

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

ISBN: 9781108407304

1st Edition

Authors: Dean Chalmers, Julian Gilbey

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Question Posted: Sep 13, 2021 03:07 AM

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Two students are randomly selected from a class of 12 girls and 18 boys. a. Find the

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a To find the expected number of girls and the expected number of boys we can u...View the full answer

Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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