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प्रश्न
The mean of the numbers obtained on throwing a die having written 1 on three faces, 2 on two faces and 5 on one face is
A) 1
(B) 2
(C) 5
(D) 8/3
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उत्तर
Let X be the random variable representing a number on the die.
The total number of observations is six.
Therefore, the probability distribution is as follows.
| X | 1 | 2 | 5 |
| P(X) | 1/2 | 1/3 | 1/6 |
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