Question

Two unbiased coins are tossed. What is probability of getting at least one head?

• A. $\frac{1}{4}$
• B. $\frac{1}{2}$
• C. $\frac{5}{4}$
• D. $\frac{3}{4}$

Answer 1

The correct option is D $\frac{3}{4}$

Sample space, $S=HH,HT,TH,TT$
P(getting atleast one head) $=$ $\frac{n\left(A\right)}{n\left(S\right)}=\frac{3}{4}$