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Of the members of a marching band, what percentage are boys who play

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Math Expert
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Joined: 02 Sep 2009
Posts: 58335
Of the members of a marching band, what percentage are boys who play  [#permalink]

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New post 11 Oct 2019, 00:35
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

80% (01:12) correct 20% (00:23) wrong based on 15 sessions

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Re: Of the members of a marching band, what percentage are boys who play  [#permalink]

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New post 13 Oct 2019, 03:12
Bunuel wrote:
Of the members of a marching band, what percentage are boys who play trombone?


(1) 30 percent of the members of the band play trombone.

(2) 60 percent of the members of the band are boys.


We are asked to calculate "number of boys who play trombone / number of members in the band".
We'll see which of the statements gives us both of these numbers or their ratio, a Logical approach.

(1) tells us that 30% = "members who play trombone / members in the band".
Not what we need; insufficient.

(2) tells us that 60% = "boys in the band / members in the band."
Not what we need; insufficient.

Combining gives us no way to calculate the "number of boys who play trombone", a value ranging from 0 to 30% of the band.
Insufficient; (E) is the answer.
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Re: Of the members of a marching band, what percentage are boys who play   [#permalink] 13 Oct 2019, 03:12
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