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OpenStudy (anonymous):
suppose dice were rolled 248 times. Find the mean and standard deviation for a sum of seven?
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OpenStudy (dumbcow):
\[mean = np = 248*\frac{1}{6}\] \[std = \sqrt{np(1-p)} = \sqrt{248*\frac{1}{6}*\frac{5}{6}}\]
OpenStudy (anonymous):
How many dice?
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