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प्रश्न
A fair coin is tossed 8 times, find the probability of exactly 5 heads .
उत्तर
Let X denote the number of heads obtained when a fair is tossed 8 times.
Now, X is a binomial distribution with n = 8,\[p = \frac{1}{2}\] and \[q = 1 - \frac{1}{2} = \frac{1}{2}\]
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