Q. $A$ and $B$ are two independent events such that $P(A)\frac{1}{2}$ and $P(B) = \frac{1}{3},\ then\ P$(neither $A\$nor $B$)is equal to

A) $\frac{2}{3}$
B) $\frac{1}{6}$
C) $\frac{5}{6}$
D) $\frac{1}{3}$
Explanation

(d)
Since, $A$ and $B$ are independent events.
$\therefore\ P(A \cap B) = P(A).P(B) = \frac{1}{2} \times \frac{1}{3} = \frac{1}{6}$
Now, $P(A \cup B) = P(A) + P(B) - P(A \cap B)$
$= \frac{1}{2} + \frac{1}{3} - \frac{1}{6} = \frac{2}{3}$
$\therefore\ P\left( \overline{A} \cap \overline{B} \right) = 1 - P(A \cup B)$
$= 1 - \frac{2}{3} = \frac{1}{3}$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.