In a class test ( +4 ) marks are given for every correct answer and (-2) marks are given
for every incorrect answers and no marks for not attempting any question.
Rohan scored 24 marks. If he has got 12 correct answers , how many questions has he
attempted incorrectly?
Radhika scored (- 4 marks) , even though she has got 7 correct answers. How many
questions has she attempted incorrectly?
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Step-by-step explanation:
Rohan scored 12×4=48 marks [as 4 marks are for correct answer]
Final score of Rohan is 24.
He got 24 marks negative [as −2 marks are for incorrect answer]
∴ He made 24/2 = 12 incorrect answer.
Radhika scored 7×4=28 marks[ as 3 marks are for correct answer]
Final score of Radhika is −4.
she got 32 marks negative [as −2 marks are for incorrect answer]
∴ She made 32/2 = 16 incorrect answer.
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