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# If the terms of the sequence are t1, t2, t3,........, tn,

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Director
Joined: 08 Feb 2007
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Location: New Haven, CT
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If the terms of the sequence are t1, t2, t3,........, tn, [#permalink]  29 Jul 2007, 08:37
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If the terms of the sequence are t1, t2, t3,........, tn, what is the value of n?

1) The sum of the first n terms is 3,124

2) The average of the n terms is 4.
Senior Manager
Joined: 06 Mar 2006
Posts: 497
Followers: 7

Kudos [?]: 92 [0], given: 1

I believe the answer should be C.

Statement 1 is not sufficient since it only gives the sum.

Statement 2 is not sufficient since it only gives the average.

However, when you combine the two statements, you will be able to know the number n just by divide the sum to the average.
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