Re: ISI 2014 PEA Answer Key

Posted by Dr. Strange on Apr 23, 2016; 12:05pm
URL: http://discussion-forum.276.s1.nabble.com/ISI-2014-PEA-Answer-Key-tp7587867p7600000.html

 This is a binomial distribution with p(success)= 1/2 and n=10
Mean score = mean of this binomial distribution= np = 5
so P(SCORE =5)=p (NO. OF SUCCESS=5)= C(10,5)* (1/2)^5 * (1/2)^5  = 63/256