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## GMATPrep Test 1 - DS Sequence

This topic has 2 member replies
medenica Newbie | Next Rank: 10 Posts
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#### GMATPrep Test 1 - DS Sequence

Thu Jan 11, 2007 10:55 pm
If the terms of a squence are t1, t2, t3, ... , tn, what is the value of n?

1) The sum of the n terms is 3,124
2) The average of the n terms is 4

1 and 2 together are sufficient but can someone actually work out the problem? What are the formulas through which n is derived?

medenica Newbie | Next Rank: 10 Posts
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Thu Jan 11, 2007 11:43 pm
Oh wow... how embarrassing. I was really complicating things - it's funny how missing what's being asked for does that...

tnx!

Argen Junior | Next Rank: 30 Posts
Joined
07 Jan 2007
Posted:
24 messages
1
Thu Jan 11, 2007 11:17 pm
2) suggests that 4 = (sum of n terms) / n
1) states that (sum of n terms) = 3124
Therefore n = (sum of n terms) / 4 = 3124 / 4 = 781

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