12. In a class test containing 10 questions, 5 marks are awarded for every correct answer and (2)marks are awarded for every incorrect answer and 0 for each questions not attempted.
i) Ravi gets 4 correct and 10 incorrect answers. What is his score?
ii) Anushka gets eight correct and twelve incorrect answer. What is her score?
iii) Twisha gets 10 correct and 10 incorrect answers. What is her score?
13. Evalute : i) 60- (-10) il) (-3454) + (-11) 1) 45+ [(-2) + (-1) iv) [(-48) +12] 2
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Step-by-step explanation:
Q12
(i) For 4 correct answer = 4 × 5 = 20
For 10 incorrect answer =10 × (-2) = -20
Total score = 20 + (-20) = 20 - 20 = 0
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(ii) For 4 correct answer = 8 × 5 = 40
For 12 incorrect answer =12 × (-2) = -24
Total score = 40 + (-24) = 40 - 24 = 16
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(iii) For 10 correct answer = 10 × 5 = 50
For 10 incorrect answer =10 × (-2) = -20
Total score = 50 + (-20) = 50 - 20 = 30
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