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IIT JEE Advanced 2010 Paper 2

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Question : 40

Total: 57

A signal which can be green or red with probability 4/5 and 1/5 respectively, is received by station A and then transmitted to station B. The probability of each station receiving the signal correctly is 3/4. If the signal received at station B is green, then the probability that the original signal was green is

3
5
6
7
20
23
9
20

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