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 student who can pass the test to the total student who can pass is about a)70%
b)75%
c)73%
d)68%