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?
SCERT Class 7 Telangana, Maths Chapter 1 Integers
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Answered by
215
i)(20-12)
=8/2 = 4
ii)21+5 /
=26/2
=13
=8/2 = 4
ii)21+5 /
=26/2
=13
Answered by
275
1) radhika scored 36 marks.
final score of radhika is 20.
she got 16 marks negative.
therefore she made 8 incorrect answer.
2) mohini scored 21 marks.
final score of radhika is -5.
she got 26 marks negative.
therefore she made 13 incorrect answer.
final score of radhika is 20.
she got 16 marks negative.
therefore she made 8 incorrect answer.
2) mohini scored 21 marks.
final score of radhika is -5.
she got 26 marks negative.
therefore she made 13 incorrect answer.
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