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Multiple Choice Questions

Sumitra has an average of 56 in her first 7 examinations How much should she make in her eighth exam...........

Quantitative Aptitude (RRB NTPC) Average

Sumitra has an average of 56% in her first 7 examinations. How much should she make in her eighth examination to obtain an average of 60% in 8 examinations?

98%

78%

88%

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Explanation:

First 7 exams
average = 56 %
so total marks available in first 7 exams = 700
Flora scored 56*7
in 8 exams
If average is 60%
Total marks available in 8 exams = 800
Flora should score 60*8 in total
Total score for 7 exams = 392
Total score required for 8 exams = 480
marks to be scored in 8th exam = 480 - 392 = 88

Hence, option 3 is the correct answer.

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