The marking scheme of any class test in a school is as follows:
5 marks are awarded for every correct answer. -2 marks are awarded for every incorrect answer. 0 marks are awarded for unattempted questions.
Meera scored -5 marks in a test though she has got 7 correct answers. How many questions has she attempted incorrectly?
a. 10
b. 20
c. 30
d. 40
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Answer:
Q7) 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.
Answered by
2
Step-by-step explanation:
let the number of incorrect answer be x
incorrect marks = -2x
correct marks =7×5 =35
-2x + 35 = -5
40=2x
x = 20
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