Eight coins are tossed together and the occurrence of a head is termed a success. Write down the Binomial distribution of probabilities for the occurrence of 0, 1, 2....8 heads. What is the arithmetic mean and what is the variance of this distribution?
| A. | 2 |
| B. | 9 |
| C. | 3 |
| D. | 5 |
Answer : A Explanation : P = 1/2, q = 1/2, n = 8 Mean = np = 8 x 1/2 = 4 Variance (σ)2 = npq or 8 x 1/2 x 1/2 = 2 |
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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
