Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Box – I contains 5 red and 2 blue balls while box – II contains 2 red and 6 blue balls. A fair coin is tossed. If it turns up head, a ball is drawn from box–I, else a ball is drawn from box–II. Find the probability of each of the following :
(i)A red ball is drawn
(ii)Ball drawn is from box–I if it is blue
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(i) 
(ii) 
Sol. B1 → 5R + 2B ; B2 → 2R + 6B
(i) P(R) = 
= 
(ii) A : Ball drawn is blue
B 1 : From B 1
B 2 : From B 2
P(B 1 /A) = 
= 
= 
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