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Over the past year, did the number of male students in the school incr

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Over the past year, did the number of male students in the school incr  [#permalink]

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New post 03 Jan 2018, 08:31
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Over the past year, did the number of male students in the school increase?

(1) Over the past year, the ratio of number of male students to the total number of students increased.
(2) Over the past year, the total number of students increased.

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Over the past year, did the number of male students in the school incr  [#permalink]

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New post 03 Jan 2018, 09:29
Bunuel wrote:
Over the past year, did the number of male students in the school increase?

(1) Over the past year, the ratio of number of male students to the total number of students increased.
(2) Over the past year, the total number of students increased.


S1 - \(\frac{No. of male students}{Total no. of students}\) increased
Therefore, either no. of male students increased or total no. of students decreased.
Insufficient.

S2 - Total no. of students increased
No. of Male students could increase or remain constant.
Insufficient.

Combining S1+S2, Ratio increased and total no. of students also increased.
Hence no. of male students must increase.
Sufficient.

Answer C.
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Re: Over the past year, did the number of male students in the school incr  [#permalink]

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New post 03 Jan 2018, 09:32
Bunuel wrote:
Over the past year, did the number of male students in the school increase?

(1) Over the past year, the ratio of number of male students to the total number of students increased.
(2) Over the past year, the total number of students increased.



A

Answer is yes as the ratio can go up only if male students go up
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Re: Over the past year, did the number of male students in the school incr  [#permalink]

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New post 03 Jan 2018, 10:50
old1guy wrote:
Bunuel wrote:
Over the past year, did the number of male students in the school increase?

(1) Over the past year, the ratio of number of male students to the total number of students increased.
(2) Over the past year, the total number of students increased.



A

Answer is yes as the ratio can go up only if male students go up


Hi

Its possible that the number of male students stayed the same or even decreased slightly, but the number of female students dropped by a big number. That would also cause the ratio of male students : total students to go up.
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Re: Over the past year, did the number of male students in the school incr &nbs [#permalink] 03 Jan 2018, 10:50
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