400 students took a mock exam in delhi , 60 % of the boys and 80 % of the girls cleared the cut off in the examination . if the total percentage of students qualifying is 65 % , how many girls appeared in the examination ?
60 % * x + 80 % * ( 400 - x ) = 65 % * 400 ans = 100 answer : b
divide(subtract(multiply(400, divide(65, const_100)), multiply(400, divide(60, const_100))), subtract(divide(80, const_100), divide(60, const_100)))