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Question -

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 si× 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) Marks awarded to Mohan = 4 × 5
=20 for correct answers Marks awarded to Mohan = 6 × (-2)
= -12 for incorrect answers.
∴ Total marks obtained by Mohan
= 20 + (-12) = 20 – 12 = 8
(ii) Marks awarded to Reshma for correct answers
= 5 × 5 = 25
Marks awarded to Reshma for incorrect answers
= 5 × (-2) = -10
∴ Total marks obtained by Reshma
= 25 + (-10) = 25 – 10 = 15
(iii) Marks awarded to Heena for correct answers
= 2 × 5 = 10
Marks awarded to Heena for incorrect answers
= 5 × (-2) = -10
Number of question not attempted by Heena
= 10 – (2 + 5) = 10 – 7 = 3
Marks awarded to Heena for non-attempted questions
=3×0=0
∴ Total marks obtained by Heena
= 10 + (-10) + 0 = 10-10+ 0 = 0

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