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09 Aug 2024, 01:30
Kudos
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E
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Difficulty:
35%
(medium)
Question Stats:
72% (01:58) correct
28%
(02:23)
wrong
based on 185
sessions
History
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In a particular course, Arif appeared in 10 quizzes. The average of his best 9 quizzes is 10% more than the average of all the quizzes he attended. The total marks obtained in best 9 quizzes is what % of the total marks obtained in 10 quizzes?
(A) 80%
(B) 88%
(C) 90%
(D) 95%
(E) 99%
(A) 80%
(B) 88%
(C) 90%
(D) 95%
(E) 99%
09 Aug 2024, 07:00
Kudos
Bookmarks
Let sum of 10 quizzes be b
b/10 = x
b = 10x
Let sum of best 9 quizzes be a.
a/9 = 1.ix
a = 9.9x
9.9x/10x X 100 = 99%
Answer E
Adewale Fasipe, GMAT quant instructor Lagos Nigeria.
b/10 = x
b = 10x
Let sum of best 9 quizzes be a.
a/9 = 1.ix
a = 9.9x
9.9x/10x X 100 = 99%
Answer E
Adewale Fasipe, GMAT quant instructor Lagos Nigeria.
10 Aug 2024, 02:38
Kudos
Bookmarks
Bunuel
Assuming Avg of 10 is x. Then avg of best 9 is 1.1x
Total marks \(= 10x\)
Total of Best of 9 \(= 1.1x*9 = 9.9x\)
The total marks obtained in best 9 quizzes is what % of the total marks obtained in 10 quizzes \(= \frac{9.9x}{10x} * 100 = 99%\)
Answer is E.
