In a test (+5) marks are given for every correct answer and (-2) marks are given
for every incorrect answer.
i) Radhika answered all the questions and scored 30 marks though she got 10 correct answers.
ii) Jay also answered all the questions and scored (-12) marks though he got 4 correct answers.
How many incorrect answers had they attempted?
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Answer:
Total marks for a correct answer = ( +5 )
Total marks for an incorrect answer = ( -2 )
Total marks earned by Radhika for correct answers =
10 x 5 = 50
Total score = 30 Marks
Total marks for incorrect answers = -20
Total incorrect attempts by Radhika = -20 ÷ -2 = 10 incorrect attempts.
Total marks earned by Jay for correct answers = 4 x 5 = 20
Total score = -12 Marks
Total marks for incorrect answers = (-12) - 20 = -32 Marks
Total incorrect attempts by Jay = (-32) ÷ (-2) = 16 Incorrect attempts
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