Problem 4.28: people with type o-negative blood are
universaldonors. that is, any patient can receive a transfusion
ofo-negative blood. only 7% of the american population
haveo-negative blood. if 10 people appear at random to give blood,
whatis the probability that at least 1 of them is a
universaldonor?

0.516

Step-by-step explanation:

Binomial probability distribution formula to find the probability of getting success in x trial:-

, where n is the number of trials , p is the probability of getting success in each trial.

Given :  People with type O-negative blood are  universal donors.

The proportion of  the American population  have O-negative blood =0.07

For n=10, the probability that at least 1 of them is a  O-negative blood :-

Hence, the probability that at least 1 of them is a  universal donor = 0.516

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