6. In a class test (+3) marks are given for every correct answer and (-2) marks
are given for every incorrect answer and no marks for not attempting any
question. (i) Radhika scored 20 marks. If she has got 12 correct answers, how
many questions has she attempted incorrectly? (ii) Mohini scores -5 marks in this
test, though she has got 7 correct answers. How many questions has she
attempted incorrectly?
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In a class test (+3) marks are given for every correct answer and (−2) marks are given for every incorrect answer and no marks for not attempting any question. (i) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly? (ii) Mohini scores (−5) marks in this test, though she has got 7 correct answers How many questions has she attempted incorrectly.
November 22, 2019avatar
Noor Sugandhi
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ANSWER
1) Radhika scored 12×3=36 marks. as 3 marks are for correct answer
final score of radhika is 20.
she got 16 marks negative. as −2 marks are for incorrect answer
therefore she made
2
16
=8 incorrect answer.
2) Mohini scored 7×3=21 marks. as 3 marks are for correct answer
final score of radhika is −5.
she got 26 marks negative. as −2 marks are for incorrect answer
therefore she made
2
26
=13 incorrect answer.
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