Q. A dice is thrown 5 times, then the probability that an even number will come up exactly 3 times, is
A) $\frac{5}{16}$
B) $\frac{1}{2}$
C) $\frac{3}{16}$
D) $\frac{3}{2}$
Explanation
(a)
Required probability$= \ ^{5}C_{3}\left( \frac{1}{2} \right)^{3} \times \left( \frac{1}{2} \right)^{2} = \frac{5}{16}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.