In a competitive examination, one mark is awarded for each correct answer while half mark is deducted for every wrong answer, jayanti answered 120 question correctly and got 90 marks. How many questions did she answer correctly?
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Answer:
She answered 100 questions correctly
Explanation:
if she answers correct she gets 1 mark
if she answers wrong 1/2 mark is deducted
it is given that she attempted 120 questions
as 100 questions are correct 20 questions are wrong
she gets 100 marks but she answered 20 questions wrong so 1/2 mark will be deducted from every question.
20/2 =10
By taking 10 marks from 100 marks she gets 90 marks
Hence, she attempted 100 questions correctly
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