Determining the mean-variance
A scientist attempts to perform a difficult experiment. She is successful in about 80% of her attempts. She attempts the experiment 6 times.
Let X is the number of these attempts that succeed. Find the mean and the variance of X.
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A scientist attempts to perform a difficult experiment. She is successful in about 80% of her attempts. She attempts the experiment 6 times. Let X is the number of these attempts that succeed. Find the mean and the variance of X.
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