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If Bob and Jen are two of 5 participants in a race, how many different
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17 Nov 2022, 04:06
17 Nov 2022, 04:06
Expert Reply
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Question Stats:
20% (02:27) correct
80% (01:04) wrong based on 5 sessions
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If Bob and Jen are two of 5 participants in a race, how many different ways can the race finish where Jen always finishes in front of Bob?
Show: ::
60 ways
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
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Joined: 25 May 2022
Posts: 25
Given Kudos: 1
Re: If Bob and Jen are two of 5 participants in a race, how many different
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19 Nov 2022, 04:25
19 Nov 2022, 04:25
1
Expert Reply
Total number of ways to finish the race = \(5 × 4 × 3 ×2 × 1 = 120\)
In half of them, Bob finishes ahead of Jen and in half of them, it's the reverse.
So the answer is 60.
In half of them, Bob finishes ahead of Jen and in half of them, it's the reverse.
So the answer is 60.
Re: If Bob and Jen are two of 5 participants in a race, how many different
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02 Jun 2024, 17:26
02 Jun 2024, 17:26
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