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Susan has an average of 86 in three examinations. What grade must she

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Math Expert
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Susan has an average of 86 in three examinations. What grade must she  [#permalink]

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New post 14 Oct 2019, 03:36
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

93% (00:43) correct 7% (00:09) wrong based on 14 sessions

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Location: India
Concentration: Entrepreneurship, Marketing
WE: Education (Education)
Re: Susan has an average of 86 in three examinations. What grade must she  [#permalink]

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New post 14 Oct 2019, 05:02
Bunuel wrote:
Susan has an average of 86 in three examinations. What grade must she receive on her next test to raise her average to 88?

(A) 94

(B) 90

(C) 92

(D) 100

(E) 96


Average of 86 in three examinations
--> Sum/3 = 86
--> Sum of 3 scores = 86*3 = 258

Let the fourth test score = \(x\)
--> \(\frac{(258 + x)}{4} = 88\)
--> \(258 + x = 352\)
--> \(x = 94\)

IMO Option A
GMAT Club Bot
Re: Susan has an average of 86 in three examinations. What grade must she   [#permalink] 14 Oct 2019, 05:02
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Susan has an average of 86 in three examinations. What grade must she

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