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# A foot race had 36 teams of a dozen runners each. By noon

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Senior CR Moderator
Status: Long way to go!
Joined: 10 Oct 2016
Posts: 1373
Location: Viet Nam
A foot race had 36 teams of a dozen runners each. By noon  [#permalink]

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09 Apr 2017, 17:31
00:00

Difficulty:

15% (low)

Question Stats:

89% (01:25) correct 11% (02:36) wrong based on 41 sessions

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A foot race had 36 teams of a dozen runners each. By noon, $$\frac{4}{9}$$ of the teams had finished the race, and 70 percent of the remaining teams finished the race by one o' clock. How many teams had not finished the race by one o' clock?

A. 1
B. 2
C. 4
D. 6
E. 8

Source: GMAT Free

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Joined: 18 Feb 2017
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Location: United States
Schools: UCLA Anderson
GMAT 1: 730 Q47 V42
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Re: A foot race had 36 teams of a dozen runners each. By noon  [#permalink]

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09 Apr 2017, 18:18
nguyendinhtuong wrote:
A foot race had 36 teams of a dozen runners each. By noon, $$\frac{4}{9}$$ of the teams had finished the race, and 70 percent of the remaining teams finished the race by one o' clock. How many teams had not finished the race by one o' clock?

A. 1
B. 2
C. 4
D. 6
E. 8

Source: GMAT Free

36 teams of a dozen runners This is a small trap where Number of runners in a team does not matter.

Rest of it is simple fraction

5/9 * 3/10 * 36

5/9 == ( Team that did not finish by noon as a fraction 1 - 4/9)

3/10 ==( Remaining team after 70% of 5/9 finished by 1)

Re: A foot race had 36 teams of a dozen runners each. By noon &nbs [#permalink] 09 Apr 2017, 18:18
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