Mean/Median DS problem

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Auzbee: Senior | Next Rank: 100 Posts; Posts: 77; Joined: Mon Jul 09, 2007 6:54 pm; Location: US of A

by Auzbee » Mon Dec 31, 2007 1:52 am

What is the median value of the set R, if for every term in the set, Rn = Rn–1 + 3?

(1) The first term of set R is 15.

(2) The mean of set R is 36.

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Source: Beat The GMAT — Data Sufficiency | Mon Dec 31, 2007 1:52 am

sujaysolanki: Master | Next Rank: 500 Posts; Posts: 214; Joined: Wed Nov 14, 2007 6:30 am; Thanked: 15 times

by sujaysolanki » Mon Dec 31, 2007 7:17 am

Evenly distributed terms have mean = median

Like say 1 2 3 4

Mean = 2.5
Median = 2.5

So in this case also 30 33 36 39 etc mean = median .. Hence B

Nice question

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Auzbee: Senior | Next Rank: 100 Posts; Posts: 77; Joined: Mon Jul 09, 2007 6:54 pm; Location: US of A

by Auzbee » Mon Dec 31, 2007 12:48 pm

That's the right answer.

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