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3) A telephone call costs $1.25 for the first minute and

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Director
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Joined: 27 Jun 2008
Posts: 549
WE 1: Investment Banking - 6yrs
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Kudos [?]: 46 [0], given: 92

3) A telephone call costs $1.25 for the first minute and [#permalink] New post 29 Sep 2008, 05:22
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C
D
E

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3) A telephone call costs $1.25 for the first minute and $0.32 for each additional minute. What is the cost, in dollars, of a telephone call that lasts for x minutes, where x is an integer?
(A) 0.32+ 1.25x
(B) 1.25+ 0.32x
(C) 0.32+ 1.25(x - 1)
(D) 1.25+ 0.32(x + 1)
(E) 1.25 + 0.32(x - 1)


4) The markup on a television set is 20 percent of the cost. The markup is what percent of the selling price?
(markup = selling price - cost)

(A) 8%
(B) 10%
(C) 12.5%
(D) 15%
(E) 16 2/3%
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Re: PS - Q 3 & 4 [#permalink] New post 29 Sep 2008, 06:37
X is the toal dollars of the tele call,
first call $1.25
therfore (x-1) will be the cost of the additional miniute i.e. 0.32(x-1)

Total= 1.25 + (x-1)*0.32

therefore (e)

lets say 100 is the cost,
therefore markup is 20%of cost(100) i.e. 20
markup= selling + cost

20 = S +100
S=120

what is 20 % of 120, it is 16.66

therefore answer is (e)
Re: PS - Q 3 & 4   [#permalink] 29 Sep 2008, 06:37
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3) A telephone call costs $1.25 for the first minute and

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