A school's annual budget for the purchase of student comp

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A school's annual budget for the purchase of student comp [#permalink]

01 Oct 2012, 10:51

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A school's annual budget for the purchase of student computers increased by 60% this year over last year. if the price of student computers increased by 20% this year, then the number of computers it can purchase this year is what percent greater than the number of computers it purchased last year?

a. 33.33%
b. 40%
c. 42%
d. 48%
e. 60%

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Re: A school's annual budget for the purchase of student comp [#permalink]

01 Oct 2012, 10:58

ENAFEX wrote:

If last year, the budget was B and the price of one computer was P, then B/P was the number of purchased computers.
This year, 1.6B/(1.2P) = 4/3(B/P) = 1.33(B/P) computers can be purchased, which is 33.33% greater than the number of computers purchased last year.

Answer A.
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Re: A school's annual budget for the purchase of student comp [#permalink]

02 Oct 2012, 04:33

ENAFEX wrote:

Since the price is increased by 20%, for 120% of last year budget they get as many computers as they got last year, say n
For 160% they will get 160/120 = 4/3n
Hence 1/3n i.e. 33.33% more than last year
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Re: A school's annual budget for the purchase of student comp [#permalink] 02 Oct 2012, 04:33

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A school's annual budget for the purchase of student comp

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A school's annual budget for the purchase of student comp

A school's annual budget for the purchase of student comp

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