Q. A bag contains 7 red and 2 white balls and another bag contains 5 red and 4 white balls. Two balls are drawn, one from each bag. The probability that both the balls are white, is
A) 2/9
B) 2/3
C) 8/81
D) 35/81
Explanation
(c)
Required probability $= \frac{{\ ^{2}C}_{1}}{{\ ^{9}C}_{1}} \times \frac{{\ ^{4}C}_{1}}{{\ ^{9}\ C}_{1}} = \frac{8}{81}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.