Box P has 2 red balls and 3 blue balls. Box Q has 3 red balls and 1 blue ball.…
GATE · 2005 · CS
Box P has 2 red balls and 3 blue balls. Box Q has 3 red balls and 1 blue ball. A ball is selected as follows:
(i) Select a box.
(ii) Choose a ball from the selected box, with each ball in that box equally likely to be chosen.
The probabilities of selecting boxes P and Q are 1/3 and 2/3, respectively. Given that the selected ball is red, what is the probability that it came from box P?
- A.
4/19
- B.
5/19
- C.
2/9
- D.
19/30
Attempted by 29 students.
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