Q18. In a class test, 3 marks are awarded for every correct answer and (-2) marks
are awarded for every incorrect answer and no marks not attempting any
question. Radhika scored 25 marks. If she has got 15 correct answers, how
many questions has she attempted incorrectly?
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1
Answer:
10 questions.
Step-by-step explanation:
for 15 correct answers she has scored 15*3 = 45 marks
and 20 marks deducted for wrong answers (-2)*10 = -20, and thats why she scored 25 marks.
Hence, Radhika attempted 10 questions incorrectly.
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