Bag I contains 3 red, 4 black and 3 white balls and Bag II contains 2 red, 5 black and 2 white balls. One ball is transferred from Bag I to Bag II and then a ball is drawn from Bag II. The ball so drawn is found to be black in colour. Then the probability, that the transferred ball is red, is :
← JEE Main 2022 · 29 Jul · Shift 2
MathematicsSingle correct+4 / -1Question 16 of 90
JEE Main 2022 · 29 Jul · Shift 2, Mathematics question 16
Answer and worked solution
Official answer: B
Bayes. After transfer, P(black) is (red or white moved) or (black moved).
Posterior .
(B)
Topics:Bayes' theorem