Aptitude Day 133

Problems on Probability:  

                     

1. In a simultaneous throw of 2 dice, what’s the probability of getting a total of 10?

Solution:

                  n(S) = 36

                  E = {(4,6), (5,5), (6,4)}

                  P(E) = n(E)/ n(S)

                          = 3/36

                          = 1/12.

2. What’s the probability of getting a sum  5 from 2 throws of a dice?

Solution:

                 n(S) = 36

                 E = {(1,4), (2,3), (3,2),(4,1)}

                 P(E) = n(E)/ n(S)

                         = 4/36

                         = 1/9.