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# gmatprep ds

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Current Student
Joined: 31 Aug 2007
Posts: 367

Kudos [?]: 165 [0], given: 1

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06 Nov 2007, 15:57
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in terms of a sequence t1, t2, t3...tn, what is the value of n?

1-the sum of n terms is 3,124
2-the mean of the n terms is 4

Kudos [?]: 165 [0], given: 1

VP
Joined: 09 Jul 2007
Posts: 1098

Kudos [?]: 144 [0], given: 0

Location: London

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06 Nov 2007, 16:03
young_gun wrote:
in terms of a sequence t1, t2, t3...tn, what is the value of n?

1-the sum of n terms is 3,124
2-the mean of the n terms is 4

C

1. insuff. t1+t2+t3+...+tn=3124
2. insuff. only the average is given.

combined

3124/n=4
n=3124/4
n=782

Kudos [?]: 144 [0], given: 0

Current Student
Joined: 31 Aug 2007
Posts: 367

Kudos [?]: 165 [0], given: 1

### Show Tags

06 Nov 2007, 16:35
Ravshonbek wrote:
young_gun wrote:
in terms of a sequence t1, t2, t3...tn, what is the value of n?

1-the sum of n terms is 3,124
2-the mean of the n terms is 4

C

1. insuff. t1+t2+t3+...+tn=3124
2. insuff. only the average is given.

combined

3124/n=4
n=3124/4
n=782

oh maaaan, i did not realize how simple this problem was when i was actually doing it....thanks Rav

Kudos [?]: 165 [0], given: 1

Re: gmatprep ds   [#permalink] 06 Nov 2007, 16:35
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