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If the terms of a sequence are t1, t2, t3,...., tn (note

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Manager
Joined: 08 Jul 2007
Posts: 174
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If the terms of a sequence are t1, t2, t3,...., tn (note [#permalink]  10 Jul 2007, 17:30
If the terms of a sequence are t1, t2, t3,...., tn (note that the 1, 2, 3,...., and n are subscripts), what is the value of n?

(1) the sum of the n terms is 3124
(2) the average of the n terms is 4

thanks guys!
GMAT Club Legend
Joined: 07 Jul 2004
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Location: Singapore
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St1:
Insufficient. We have no idea what type of sequence this is.

St2:
All we know is sum = 4n. Insufficient.

Using st1 and St2, we can solve for n. Sufficient.

Ans C
Manager
Joined: 08 Jul 2007
Posts: 174
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Kudos [?]: 5 [0], given: 0

thanks for the help on this one. i was just spacing out!
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