Q.
If a variable takes the values 0, 1, 2, ....., n with frequencies proportional to binomial coefficients nC0, nC1, nC2, ....., nCn ; then mean of distribution is
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a
2nn+1
b
2n+1n(n+1)
c
n+12
d
n2
answer is D.
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Detailed Solution
∑ fixi∑fi =n 2n-12n=n2
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