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प्रश्न
In a group of 200 items, if the probability of getting a defective item is 0.2, write the mean of the distribution.
उत्तर
It is given that the binomial distribution's p =0.2 and number of items (n) = 200
Hence,\[\text{ mean, i . e . } np = 200 (0 . 2) = 40\]
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