In a class test contaning 10 question,5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions are not attempted.
(i) Mohan gets four correct and six incorrect answer, what is his score?
(ii) Reshma gets five correct answer and five incorrect answers, what is her score ?
(iii) Heena gets tow correct and five incorrect answers out of seven questions she attempts, what is her score?
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We need to find the scores of these students. Let us say for any student who gave x right questions and y wrong questions, his total marks is given as 5x + (−2)y i.e. 5x − 2y total marks. Reshma gets 5 correct answers and 5 incorrect answers. So, her total score is 5×5−2×5=15 marks.
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(i) 4(5)=20
6(-2)=-12
20-12=8
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