Question

If three coins are tossed, find the probability of getting, at least, one tail.

• A. 1/8
• B. 7/8
• C. 5/8
• D. 3/8

Answer 1

The correct option is B

7/8

The complementary event is getting all heads, that is, HHH.

Since there is a total of 8 outcomes, the probability of the complementary event is $\frac{1}{8}$.

Hence, the required probability is 1 – $\frac{1}{8}$ = $\frac{7}{8}$.