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1. An urn contains 7 green balls and 5 red balls. And experiment consists
of drawing 4 balls with replacement and noting the color of each ball. Let
x be the random variable which counts the number of green balls in this
sample.
(a) Develop the probability distribution of x.
(b) Find the mean of x.
(c) Find the standard deviation of x.
2. An urn contains 7 green balls and 5 red balls. And experiment consists
of drawing 4 balls without replacement and noting the color of each ball.
Let x be the random variable which counts the number of green balls in
this sample.
(a) Develop the probability distribution of x.
(b) Find the mean of x.
(c) Find the standard deviation of x.
3. Page 247, number 104.
4. Page 247, number 107.
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