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What will be the probability to get his success in that exam ?

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A student get 450 marks out of 500 marks in an exam having subject Hindi, Mathematics, Physics, Chemistry and English. For qualifying an exam of Science his score should be 90% in 3 subjects Physics, Chemistry and Mathematics.
What will be the probability to get his success in that exam ?

posted Apr 30, 2015 by Mohammad

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1 Answer

+4 votes

Number of combinations for Physics, Chemistry and Mathematics are
(5*4*3*2*1)/(3*2*1*2*1) = 10
Out of 10 combinations non-qualifying combination are
(82,85,93), (82,85,94), (82,85,96) and (82,93,94)
So possibility to get his success = 6/10
=3/5

answer May 1, 2015 by Jaspalsingh Parmar



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