WBJEE 2021 Math Solved Paper
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CATEGORY - I (Q:1 to Q50)
Carry 1 mark each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ¼ mark will be deducted.
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Question : 23 of 75
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The mean and variance of a binomial distribution are 4 and 2 respectively. Then the probability of exactly two succsses is
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