Question

two dice are thrown simultaneously find the probability of getting a sum 9 is a single throw

Answer 1

let S be the sample space of the random experiment

n(S) = 6^2 = 36

let A = event of getting a sum of 9 in a single throw

A = { (3,6),(4,5),(5,4),(6,3)}

n(A) = 4

probability P(A)

= n(A)/n(S)

= 4/36

= 1/9