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If the standard deviation of the binomial distribution (q+p)^(16)is 2, then mean of the distribution is….

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Solution :At X=-2, F must be continuous
`THEREFORE(1)/(2)=a+4b""......(1)`
At x=-2, L.H.D.=R.H.D.
`2bx=(1)/(x^(2))""......(2)`


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