3. In a test containing 20 questions, 4 marks are awarded for every correct answer and 2 marks are deducted for every incorrect answer. What will be the score of a student who attemple all the questions out of which 8 of his answers are incorrect?
Answers
Answered by
30
Answer:
32
Step-by-step explanation:
Given that in a test containing 20 questions, 4 marks are awarded for every correct answer and 2 marks are deducted for every incorrect answer.
Also, student attemple all the questions out of which 8 of his answers are incorrect.
Let's say that the number of answers that are wrong is x. So, correct answers given by the student is (20 - x).
Now,
Number of marks scored on each correct answer = 4(20 - x) = 80 - 4x and on each wrong answer = 2x
Total score = Socre on each correct answer - Score on each wrong answer
= 80 - 4x - 2x
= 80 - 6x
As per given question, 8 of his answers are incorrect. Means, the value of x is 8.
= 80 - 6(8)
= 80 - 48
= 32
Therefore, the score of a student is 32.
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