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Question 43

In an examination, a pupil’s average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?

Solution

Let number of papers be $$x$$ and total marks in all papers = $$63x$$

According to ques,

=> $$\frac{63x+20+2}{x}=65$$

=> $$63x+22=65x$$

=> $$2x=22$$

=> $$x=\frac{22}{2}=11$$

=> Ans - (D)

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