Q. Three coins are tossed together, then the probability of getting at least one head is
A) $\frac{1}{2}$
B) $\frac{3}{4}$
C) $\frac{1}{8}$
D) $\frac{7}{8}$
Explanation
(d)
$P$(At least on head)$= 1 - P$(zero head)
$= 1 - P$(all three tails)
$= 1 - \frac{1}{8} = \frac{7}{8}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.