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# In a small snack shop.....

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Manager
Joined: 22 Sep 2010
Posts: 88

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In a small snack shop..... [#permalink]

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08 Oct 2010, 05:38
00:00

Difficulty:

(N/A)

Question Stats:

33% (01:37) correct 67% (01:11) wrong based on 3 sessions

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In a small snack shop, the average (arithmetic mean) revenue was \$400 per day over a 10-day period. During this period, if the average daily revenue was \$360 for the first 6 days,what was the average daily revenue for the last 4 days?

A. \$420
B. \$440
C. \$450
D. \$460
E. \$480

Kudos [?]: 215 [0], given: 0

Director
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 615

Kudos [?]: 1134 [0], given: 39

Re: In a small snack shop..... [#permalink]

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08 Oct 2010, 05:45
Ans. 460
400 x 10= 4000
360 x 6 = 2160
4000-2160 = 1840/4=460
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Retired Moderator
Joined: 02 Sep 2010
Posts: 793

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Location: London
Re: In a small snack shop..... [#permalink]

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08 Oct 2010, 16:09
pzazz12 wrote:
In a small snack shop, the average (arithmetic mean) revenue was \$400 per day over a 10-day period. During this period, if the average daily revenue was \$360 for the first 6 days,what was the average daily revenue for the last 4 days?

A. \$420
B. \$440
C. \$450
D. \$460
E. \$480

Avg(10 days) = (Avg(6 days)*6 + Avg(4 days)*4)/10
10*\$400 = 6*\$360 + 4*x
x+6*90=1000
x=460

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Re: In a small snack shop.....   [#permalink] 08 Oct 2010, 16:09
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