At the college entrance exam, a candidate is admitted according to whether he has passed or failed the test. Of the candidates who are really capable, 80 % pass the test and of the incapable, 25 % pass the test. Given that 40 % of the candidates are really capable, then the proportion of the really capable students who can pass the test to the total students who can pass is about:
A. 68%
B. 70%
C. 75%
D. 73%
(L&T Infotech Question)
Asked by Priya kumari
RISHABH AGARWAL   Let total students are 100,
really capable = 40% of 100 =40
incapable =100-40 =60% of 100 =60
80% really capable passes =40*80/100 = 32
25% incapable passes =60*25/100 =15
Total students passes =32+15 =47
% of really capable students out of 47 total passed students = 32*100/47 =3200/47 = 68.09% =68%
2 years ago

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