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# The average (arithmetic mean) of b bowling scores is x. When one score

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Math Expert
Joined: 02 Sep 2009
Posts: 60646
The average (arithmetic mean) of b bowling scores is x. When one score  [#permalink]

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08 Oct 2019, 23:56
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Difficulty:

35% (medium)

Question Stats:

62% (01:31) correct 38% (01:24) wrong based on 26 sessions

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The average (arithmetic mean) of b bowling scores is x. When one score is discarded, the average of the remaining scores becomes y. What is the discarded score?

A. b(x – y) + y
B. b(x + y) + y
C. bx + y
D. b(x – y) – y
E. b(x – y) – 1

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Re: The average (arithmetic mean) of b bowling scores is x. When one score  [#permalink]

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09 Oct 2019, 10:36
Bunuel wrote:
The average (arithmetic mean) of b bowling scores is x. When one score is discarded, the average of the remaining scores becomes y. What is the discarded score?

A. b(x – y) + y
B. b(x + y) + y
C. bx + y
D. b(x – y) – y
E. b(x – y) – 1

sum of b scores ; bx
sum after 1 score is discarded ; (b-1)*y
b(x – y) + y
IMO A
Re: The average (arithmetic mean) of b bowling scores is x. When one score   [#permalink] 09 Oct 2019, 10:36
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