The students of a particular class were given two tests for evaluation. Twenty Five percent of the class cleared both the tests and forty five percent of the students were able to clear the first test.
You have to calculate the percentage of those students who passed the first test and were also able to pass the second test. How will you do it?  Choose the correct choice:  A) 39%  B) 41%  C) 60%  D) 70%  E) 88%
C   60%   In all such cases where you have to find out the probability of anything with an already given situation, you have to use the formula for conditional probability.   In this case, you have to find out the probability that the second test was passed by a student given that he passed the first test already.   Therefore, P(Second/First) = P (First and Second)/ P (First)   = 0.25/0.42   =0.60   =60 %
<result>C</result>
The students of a particular class were given two tests for evaluation. Twenty Five percent of the class cleared both the tests and forty five percent of the students were able to clear the first test.
You have to calculate the percentage of those students who passed the first test and were also able to pass the second test. How will you do it?