Question: Repeat Example 2 using a random sample of 4. Data from Example 2 A carton of 20 laptop batteries contains 2 defective ones. A random

Repeat Example 2 using a random sample of 4.

Data from Example 2

A carton of 20 laptop batteries contains 2 defective ones. A random sample of 3 is selected from the 20 and tested. Let X be the random variable associated with the number of defective batteries found in a sample.

a. Find the probability distribution of X.

b. Find the expected number of defective batteries in a sample.

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