Q. 125.0( 1 Vote )

Mark the correct A. 2/3

B. 4/5

C. 7/8

D. 15/16

Answer :

Given:


Mean= 2


Variance=1


P(x>1)=?


P(x>1)=1-p(x1)


= 1-[p(x=0)+p(x=1)]


=1-[ 11qn +npqn-1]


2(1-p)=1



=q



np=2


n=4



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