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# A telephone company offers a special service to customers

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VP
Joined: 26 Apr 2004
Posts: 1207

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Location: Taiwan
A telephone company offers a special service to customers [#permalink]

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06 Aug 2004, 08:58
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A telephone company offers a special service to customers who make long-distance calls. For an additional monthly charge of \$8, all long-distance charges in excess of \$16 for a month are reduced by 50 percent. If a customer has long-distance charges of \$48 for one month without the special service, how much would the customer have saved by using the special service?

(A)\$0

(B) \$8

(C)\$16

(D)\$20

(E)\$32

Kudos [?]: 822 [0], given: 0

VP
Joined: 26 Apr 2004
Posts: 1207

Kudos [?]: 822 [0], given: 0

Location: Taiwan

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06 Aug 2004, 09:36
Excuse me.

I supposed

8 + 16 + (48-16) * 0.5 = 40

48 - 40 = 8

Is this right?

Kudos [?]: 822 [0], given: 0

Director
Joined: 16 Jun 2004
Posts: 891

Kudos [?]: 65 [0], given: 0

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06 Aug 2004, 09:43
chunjuwu,
You are right.

it has to be

8 + 16 + (48-16) * 0.5 = 40

48-40 = 8.

Absolutely right.

Kudos [?]: 65 [0], given: 0

Manager
Joined: 28 Jul 2004
Posts: 179

Kudos [?]: 18 [0], given: 0

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06 Aug 2004, 16:32
48-16+8 = \$8

I know this is the worst way to explain a math problem. But since you guys have already explained it pretty well... do i need to

--- lazy fella

Kudos [?]: 18 [0], given: 0

Director
Joined: 20 Jul 2004
Posts: 590

Kudos [?]: 158 [0], given: 0

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06 Aug 2004, 17:28
chunjuwu wrote:
Excuse me.

I supposed

8 + 16 + (48-16) * 0.5 = 40

48 - 40 = 8

Is this right?

Both ways are right chunjuwu.
1) What you did was:
Total the guy actually spent = 48
Total the guy should have spent = extra charge + full amt upto 16 + 1/2 (rest) = 8 + 16 + (48-16) * 0.5 = 40
Prospective savings = 48 - 40 = 8

2) What I did was:
Just calculating the savings only (or rather company's expenditure only):
Company has to pay the 1/2 of rest, but it gets \$8 from the guy
So guys savings = company's expenditure = (48-16)/2 - 8 = 8

This method probably saves just a couple of seconds...

Kudos [?]: 158 [0], given: 0

06 Aug 2004, 17:28
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# A telephone company offers a special service to customers

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