In a lass ,40% of students are girls . Of the total number of boys 50% failed in an exam. What per cent of the boys passed in the exam?

In a school 60% of the students are girls. If number of boys is 480, then what is the total number of students in the school?

In the half yearly exam only 70% if the students were passed. Out of these (passed in half yearly) only 60% student are passed in annual exam. Out of those who did not pass the half yearly exam, 80% passed in annual exam. What per cent of the students passed the annual exam ?

In a class, if 60% of the students are boys and the number of girls is 36, then the number of boys is:

In a school, 60% of the numberof students are boys and the rest are girls. If 20% of the number of boys failed and 65% of the number of girls passed the examination, then the percentage of the total number of students who passed is:

If 50% of (x-y) = 40% of (x + y) then what per cent of x is y ?