Aptitude Hack#6(1-3-19)

Question

Suppose a fair six-sided die is rolled once. If the value on the die is 1, 2, or 3, the die is rolled a second time. What is the probability that the sum total of values that turn up is at least 6?
A 10/21
B 5/12
C 2/3
D 1/6

Answer: B)5/12

 Explanation: 

The following are different possibilities (1,5) (1,6) (2,4) (2,5) (2,6) (3,3) (3,4) (3,5) (3,6) Plus 1/6 probability that first time 6 is rolled So total probability is 9/36 + 1/6 = 15/36 = 5/12.