Given:P=?P(x=r)= nCr pr qn-r= P(x=n-r)= nCn-r pn-r qn-(n-r)= nCr pn-r qr=Put values in equation, we have:1-p=p1=2pP=1/2

Q. 75.0( 1 Vote )

Mark the correct A. 1/2

B. 1/3

C. 1/4

D. none of these

Answer :

Given:

P=?

P(x=r)= ⁿC_r p^r q^n-r

P(x=n-r)= ⁿC_n-r p^n-r q^n-(n-r)

= ⁿC_r p^n-r q^r

Put values in equation, we have:

1-p=p

1=2p

P=1/2

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Mark the correct A. 1/2B. 1/3C. 1/4D. none of these