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If the mean of the probability distribution is 5, then the value of k is :
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1 2 4 3 |
4 |
The correct answer is Option (3) → 4 The mean of a discrete probability distribution is, $μ=∑X.P(X)$ $⇒5=(2×0.2)+(k×0.4)+(5×0.6)$ $⇒5=0.4+0.4k+3$ $⇒k=\frac{1.6}{0.4}=4$ |
