A couple plans to have children until they get a girl, but they agree they will not have more than three children, even if all are boys. Assume that the probability of having a girl is 0.55. Let X be a random variable indicating how many children the couple will have. Find the standard deviation of the random variable X.
A couple plans to have children until they get a girl, but they agree they will not have more than three children, even if all are boys. Assume that the probability of having a girl is 0.55. Let X be a random variable indicating how many children the couple will have. Find the standard deviation of the random variable X.
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A couple plans to have children until they get a girl, but they agree they will not have more than three children, even if all are boys. Assume that the probability of having a girl is
0.55.
Let X be a random variable indicating how many children the couple will have. Find the standard deviation of the random variable X.|
x
|
1
|
2
|
3
|
|
|---|---|---|---|---|
|
P(X=x)
|
0.550
|
0.248
|
0.202
|
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