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

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Math Expert
Joined: 02 Sep 2009
Posts: 58465
Susan has an average of 86 in three examinations. What grade must she  [#permalink]

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14 Oct 2019, 03:36
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Difficulty:

25% (medium)

Question Stats:

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

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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

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Joined: 20 Jul 2017
Posts: 944
Location: India
Concentration: Entrepreneurship, Marketing
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Re: Susan has an average of 86 in three examinations. What grade must she  [#permalink]

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