In an exam of 5 MCQs, a child can pass if he/she answers 1 question correctly. Rohan takes the exam, in how many different ways can he pass?
Christopher attempted 30% questions on his last math exam correctly. If there were 50 questions on the test, how many questions did he attempt correctly?
In a competitive exam Sumit got 187 marks out of 250 by answering 43 questions . The question paper had 50 questions. Find how many questions had he answered correctly assuming correct answer fetches 5 marks and each wrong answer results in a penalty of 2marks