IIT JEE , AIEEE Forum - Mathematics , Algebra

m.viddya

Q.Suppose X follows binomial distribution with parameters n and p where 0<p<1.If P(x=r)/P(x=n-r) is independent of n and r then p?

elastiboysai

wel applyin 4mula

ncr*p^r*(1-p)^n-r

n dividin both

p oughta be 1/2

ayshwarya

her P(x=r) = nCr p^(n-r) [1-p]^r even 4 P(x=n-r) hence by solving v wud get

[ p/(1-p)] ^n-2r =given hence as it was said dis is independent so p/(1-p) must b equal 2 1 [1 is indepemdent of any power] hence p=1-p so p=1/2

bolo bharat maata ki jai

Ask & Discuss Questions with Community & Experts