integers + average

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Sandman: Senior | Next Rank: 100 Posts; Posts: 48; Joined: Wed Mar 05, 2008 10:21 am

by Sandman » Fri Jul 18, 2008 9:05 pm

What is the sum of 5 evenly spaced integers in a set?

1. The median of the set of numbers is 0.
2. The range of the numbers in the set is 4.

Thanks.

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Source: Beat The GMAT — Data Sufficiency | Fri Jul 18, 2008 9:05 pm

Mustang: Senior | Next Rank: 100 Posts; Posts: 43; Joined: Fri Jul 18, 2008 9:20 pm; Thanked: 2 times; GMAT Score:770

by Mustang » Fri Jul 18, 2008 9:27 pm

I think the answer is C

2 confirms the the 5 numbers are consecutive
1 confirms that the middle number of the series is 0

Therefore using 1 and 2 we can say that the series is -2 -1 0 1 2

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Sandman: Senior | Next Rank: 100 Posts; Posts: 48; Joined: Wed Mar 05, 2008 10:21 am

by Sandman » Sat Jul 19, 2008 12:20 am

Ya Mustang..the answer to this one is C but im still confused..Shouldnt all series of evenly spaced number with odd number of terms (in this case 5 terms) with zero as the median have a sum of zero?? in that case A alone would sufficient to answer the question ...

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reachac: Legendary Member; Posts: 572; Joined: Fri Feb 22, 2008 9:25 am; Thanked: 21 times

by reachac » Sat Jul 19, 2008 12:24 am

I agree it should be A

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Mustang: Senior | Next Rank: 100 Posts; Posts: 43; Joined: Fri Jul 18, 2008 9:20 pm; Thanked: 2 times; GMAT Score:770

by Mustang » Sat Jul 19, 2008 11:26 am

Yeah...I think you got me there....A seems more appropriate....moral of the story...never look at 2 before you look at 1...don't know why I did that

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Sandman: Senior | Next Rank: 100 Posts; Posts: 48; Joined: Wed Mar 05, 2008 10:21 am

by Sandman » Sat Jul 19, 2008 9:49 pm

The official answer provided to this question is C as well...thats why i got so confused..I guess the right answer is A..Thanks Mustang and reachac for the inputs.

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