Posted by **Anonymous** on Friday, December 28, 2012 at 4:00am.

5. There are two groups of subjects one of which contains 5 science subjects and 3 engineering subjects and the other consists of 3 science and 5 engineering subjects. An unbiased die is cast. If the number 3 or number 5 turns up, a subject is selected at random from the first group, otherwise the subject is selected at random from the second group. Find the probability that an engineering subject is selected ultimately.

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