Question

here are 250 questions in an examination on each right answer a student get 3 marks and on each wrong answer. 0.5 marks deducted Find the number of wrong questions answered by him, if in whole exam he get 477 marks?

Answer 1

Step-by-step explanation:

Total questions = 250

Total marks = 750(250×3)

Assumption that all questions are wright we will get (250×3 = 750)

Getting marks 477 then these marks are subtracted from 750 then(750–477=273)

If one question wrong we will loose (3.5 marks)because every wrong answer penality 0.5 mark and we didn't get 3 marks also if question wrong that's why we loose (3.5 marks)

Then getting marks are divided by 3.5 (477/3.5=136)

Last step total questions -wrong answer questions. (250–136=114)

So that answer will be 136 questions answered wrongly...