Question

In tossing of 3 coins, the probability of getting exactly 1 head is:

• A. $\frac{1}{4}$
• B. $\frac{2}{3}$
• C. $\frac{1}{3}$
• D. $\frac{3}{8}$

Answer 1

The correct option is D $\frac{3}{8}$

All possible outcomes are HHH, HHT, HTH, THH, HTT, THT, TTH, TTT.
Favourable outcomes are HTT, THT, TTH.
$\therefore$ P (exactly one head) $=\frac{\text{Favourable outcomes}}{\text{Total no. of outcomes}}=\frac{3}{8}$