A die is tossed thrice. If getting a four is considered a success, then the mean and variance of the probability distribution of the number of successes are [DSSE 1987]

A die is tossed thrice. If getting a four is considered a success, the

1.	A die is tossed thrice. If getting a four is considered a success, then the mean and variance of the probability distribution of the number of successes are [DSSE 1987]
A.	\[\frac{1}{2},\,\frac{1}{12}\]
B.	\[\frac{1}{6},\,\frac{5}{12}\]
C.	\[\frac{5}{6},\,\frac{1}{2}\]
D.	None of these
Answer» E.

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A die is tossed thrice. If getting a four is considered a success, then the mean and variance of the probability distribution of the number of successes are [DSSE 1987]

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