Question

A die is rolled 30 timeswhat is the probability of getting x even number

Answer 1

Probability of getting an even number (2,4,6) out of (1,2,3,4,5,6) =3/6=1/2

The probability of getting x even number :
(using the binomial probability)


30Cx (1/2)^x . (1/2)^(30-x)