in a class +3 Mark's for given every correct answers -2 for given every incorrect answers and no Mark's for not attempting any questions (1) sam scores 20 Mark's .if she got 12 correct answers ,how many questions in attempted incorrectly? (2) linga scores (-5) Mark's in this test,though has she got 7 correct answers ,how many questions has she attempted incorrectly?
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Answer:
1. 8
2. 13
Step-by-step explanation:
1.
3×12=36
36-20=16
16/2=8
2.
7×3=21
21+5=26
26/2=13