When Rolling a Pair of Dice, the Probability of Getting

Multiple Choice

When rolling a pair of dice, the probability of getting a particular total is not very high. For example, the probability of failing to roll a total of 7 is 5 times the probability of successfully rolling a total of 7. The total probability (probability of failing to roll a 7 + probability of successfully rolling a 7) is 1. What is the probability of rolling a 7?

A) 1 in 6
B) 1 in 18
C) 1 in 9
D) None of these.