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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Related Book For
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
Question Posted:
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