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Closure Property

In a computer...

Question

In a computerised test of 50 Questions, for each correct answer 1 mark is awarded and for each wrong answer 0.25 mark is deducted. A student answered the first 35 questions correctly. How many more questions from the remaining 15 should he answer correctly to score $80 %$ ?

A

5

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B

7

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C

8

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D

9

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Solution

The correct option is B 7

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