Suppose we have a pile of 20 batteries of which ve are dead, Ask an Expert

Statistics

Suppose we have a pile of 20 batteries, of which ?ve are dead. If we select 4 batteries at random, let X be the random variable measuring the number of dead batteries in the four we select.

(a) Find the probability mass function p(x).

(b) Find the expected value E(X).

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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