# EBook Problems Distrib Dists

### From Socr

## EBook Problems Set - Geometric, Hypergeometric and Negative Binomial

### Problem 1

Only about 6% of people have O-Negative blood. From a large group of donors, how many of them would you expect to test before you found someone with O-Negative blood?

- Choose one answer.

*(a) 100*

*(b) 23.2*

*(c) 16.7*

*(d) 56.2*

Answer

### Problem 2

Only about 6% of people have O-Negative blood. From a large group of donors, what is the probability that the first O-Negative donor is one of the first four people you test?

- Choose one answer.

*(a) 0.5634*

*(b) 0.0732*

*(c) 0.3454*

*(d) 0.2193*

Answer

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