# Working with probability distributions and expected values.

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Suppose 5 apples in a barrel of 25 apples are known to be rotten.

(a) Draw a histogram for the number of rotten apples in a sample of 2 apples.

(b) What is the expected number of rotten apples in a sample of 2 apples?

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#### Solution Preview

Let A be the event that choosing an apple randomly which is rotten

<br>Obviously, ...

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