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# Q17: Meg and Bob are among the 5 participants in a cycling

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Manager
Joined: 11 Jan 2007
Posts: 202
Location: Bangkok
Followers: 1

Kudos [?]: 10 [0], given: 0

Q17: Meg and Bob are among the 5 participants in a cycling [#permalink]  03 Jun 2007, 19:40
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Q17:
Meg and Bob are among the 5 participants in a cycling race. If each participant finishes the race and no two participants finish at the same time, in how many different possible orders can the participants finish the race so that Meg finishes ahead of Bob?

A.24
B.30
C.60
D.90
E.120
_________________

cool

CEO
Joined: 29 Mar 2007
Posts: 2591
Followers: 16

Kudos [?]: 234 [0], given: 0

5!/5!-3! = 5!/2! =60

C
Manager
Joined: 14 Mar 2007
Posts: 238
Followers: 1

Kudos [?]: 1 [0], given: 0

1 2 3 4 5

meg B - - -
meg - B - -
meg - - B -
meg - - - B

4*1 +4*2 +4*3+4*4 +4*5=4+8+12+16+20=60

C is the one
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