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# In 2005, there were 1050 students at a school. If the number of studen

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Math Expert
Joined: 02 Sep 2009
Posts: 58458
In 2005, there were 1050 students at a school. If the number of studen  [#permalink]

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16 Oct 2018, 01:48
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Difficulty:

15% (low)

Question Stats:

83% (01:12) correct 17% (01:51) wrong based on 38 sessions

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In 2005, there were 1050 students at a school. If the number of students at the school increased by 50 percent from 1995 to 2000, by what percent did the number of students at the school increase from 2000 to 2005?

(1) The number of students increased by 110 percent from 1995 to 2005 at the school.

(2) There were 500 students in 1995 at the school.

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Joined: 18 Jul 2018
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Location: India
Concentration: Finance, Marketing
WE: Engineering (Energy and Utilities)
Re: In 2005, there were 1050 students at a school. If the number of studen  [#permalink]

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16 Oct 2018, 02:06
From statement 1:

The number of students increased by 110 percent from 1995 to 2005 at the school.

2.1x = 1050.

x = 1050/2.1 = 500 students in 1995.

Enough data to calculate percent increase from 2000 to 2005.
A is sufficient.

From statement 2:

There were 500 students in 1995 at the school.

So a 50% increase in 2000. Students become 750 in 2000.
Enough data to calculate percent increase from 2000 to 2005.
B is sufficient.

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Re: In 2005, there were 1050 students at a school. If the number of studen   [#permalink] 16 Oct 2018, 02:06
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