1.

If a variable takes values 0, 1, 2,…,n with frequencies q^(n), (n)/(1)q^(n-1)p, (n(n-1))/(1.2)q^(n-2)p^(2),…,p^(n) where p+q = 1, then the mean is

Answer»

pq
NP
nq
`np^(2)`

ANSWER :B


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