Multiple Choice
The random variable x represents the number of boys in a family of three children. Assuming that boys and girls are equally likely, find the mean and standard deviation for the random variable x.
A) mean: 1.50; standard deviation: 0.87
B) mean: 2.25; standard deviation: 0.87
C) mean: 1.50; standard deviation: 0.76
D) mean: 2.25; standard deviation: 0.76
Correct Answer:
Verified
Correct Answer:
Verified
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