Question

In a single throw of two dice, the probability of getting a total of $7$ or $9$ is

• A. $\frac{4}{18}$
• B. $\frac{1}{3}$
• C. $\frac{5}{18}$
• D. none of these.

Answer 1

Answer: (C)

P (a total of 7 or 9)
= P (a total of 7) + P (a total of 9) $=\frac{6}{36}+\frac{4}{36}$ .
(a total of 7 and a total of 9 cannot occur simultaneously)