Question
A candidate just passed by getting 100 answers correct
by attempting 200 of the total questions. Find the total number of questions in the examination if a candidate needs 40% marks. (All questions carry equal marks)Solution
Let the total number of questions be x. then, Percentage need in exam = 40% Correct answer = 100 percentage = (correct answer)/(total questions) 
100 40 = 100 x = 250 Alternate method Given that 100 ≡ 40% 1 ≡ % 250 ≡ 100% total number of questions = 250
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