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A die is thrown 15 times. Getting a number greater than 5 is a success.Find the mean and variance of the number of successes ?

Answer»

SOLUTION :Here n=15, and `p=p(a numberlt5)=1/6` and `q=1-p=5/6` `thereforeMean=np=15/6=5/2` VARIANCE=`npq=15,1/6,5/6=25/12`


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