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August 28, 2015

Homework Help: Elementary statistics

Posted by Rose Bud on Wednesday, February 29, 2012 at 12:35am.

Nine apples, four of which are rotten, are in a refrigerator. Three apples are randomly selected without replacement. Let the random variable x represent the number chosen that are rotten. Construct a table describing the probability distribution, then find the mean and standard deviation for the random variable x.

question: WHAT STEPS WERE USED TO GET THE ANSWER?

this is the table

X P(x)

0 0.167
1 0.500
2 0.300
3 0.033

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