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closed with the note: Please see: https://gateoverflow.in/blog/8120/questions-from-coaching-institutes
A women's health clinic has four doctors and each patient is assigned to one of them. If a patient givs birth btween 8 am and 4 pm, then her chance of being attended by her assigned doctor is 3/4, otherwise it is 1/4. What is the probability that a patient is attended by the assigned doctor when she gives birth?
(A) 25/144

(B) 5/12

(C) 7/12

(D) 1/12
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@JAYKISHAN This is a problem from the book , https://books.google.co.in/books?id=32NIDQAAQBAJ. Post it using this as a caption. I will answer it. 

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Probability that patient give birth between 8am and 4 am in a day = 8/24  = 1/3

So, Require probability = (1/3*3/4) + (2/3*1/4) = 5/12

So, Answer is option B
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