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Q.7 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 questions not attempted.
(i) Mohan gets four correct and six incorrect answers. What is his score?
(ii) Reshma gets five correct answers and five incorrect answers, what is her score?
(iii) Heena gets two correct and five incorrect answers out of seven questions she attempts. What is her score?
Answer :

(i) Awarded for correct answer =(4×5) marks
Awarded for incorrect answer =6× (-2) marks
Total marks obtained by Mohan
= (4×5)+{6× (-2)}= 20-12=8
(ii) Awarded for correct answer = 5×5 = 25 Marks
Awarded for incorrect answer = 5 ×(-2) = -10
Total Marks obtained by Reshma =25-10 = 15 marks
(iii) Awarded for correct answer = 2×5 = 10Marks
Awarded for incorrect answer = 5×(-2) = -10
Total Marks obtained by Reshma =10-10= 0marks