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# highest rate

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Manager
Joined: 24 Apr 2009
Posts: 91

Kudos [?]: 20 [0], given: 2

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21 Jul 2009, 12:35
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The rate of A, B, and C to do a certain work respectively is 1/6, 1/7, and 1/8. If two of them

are to be selected at random to do the work together, what is the highest possible rate?

there are no options guys, it is a concept problem..

Kudos [?]: 20 [0], given: 2

Senior Manager
Joined: 18 Jun 2009
Posts: 356

Kudos [?]: 78 [0], given: 15

Location: San Francisco

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21 Jul 2009, 13:07
shouldnt it be the sum of the max two rates .. i.e. 1/6 + 1/7 ?

Kudos [?]: 78 [0], given: 15

Manager
Joined: 27 Jun 2008
Posts: 155

Kudos [?]: 34 [0], given: 11

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21 Jul 2009, 20:58
yeah agree with gmanjesh, whats the context BTW.

Kudos [?]: 34 [0], given: 11

Manager
Joined: 21 Jul 2009
Posts: 242

Kudos [?]: 135 [0], given: 23

Location: New York, NY

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31 Jul 2009, 08:18
gmanjesh wrote:
shouldnt it be the sum of the max two rates .. i.e. 1/6 + 1/7 ?

If we're talking about rate then the maximum rates would be 1/7 + 1/8 which are quickest workers (finishing in less time).

Kudos [?]: 135 [0], given: 23

Director
Joined: 01 Apr 2008
Posts: 873

Kudos [?]: 844 [0], given: 18

Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014

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31 Jul 2009, 10:56
mendelay wrote:
gmanjesh wrote:
shouldnt it be the sum of the max two rates .. i.e. 1/6 + 1/7 ?

If we're talking about rate then the maximum rates would be 1/7 + 1/8 which are quickest workers (finishing in less time).

1/6 is the highest rate...this guy takes 6 hours to complete one job
1/7..this guy takes 7 hours to complete one job
1/8..this guy takes 8 hours to complete one job

so 1/6 is doing work at a greater pace or a higher rate..followed by 1/7 and 1/8

Kudos [?]: 844 [0], given: 18

Manager
Joined: 22 Mar 2008
Posts: 53

Kudos [?]: 19 [0], given: 1

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01 Aug 2009, 10:51
among the 3, 1/6 is the highest rate. then 1/7 and 1/8.
so, two highest rates should be 1/6 and 1/7

Kudos [?]: 19 [0], given: 1

Re: highest rate   [#permalink] 01 Aug 2009, 10:51
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