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ds: Set [#permalink] New post 25 Mar 2005, 05:42
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
tricky?
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 [#permalink] New post 25 Mar 2005, 09:17
"E"

hmmm....rethinking statement 1 shud be

state 1: 1,1,3....or 2,4...insuff

state: S can be 32,34.....or 32,33,34...insuff

combine: 32,32,34....or 32,34...insuff


-------------------------------------------------------------
"E"

Last edited by banerjeea_98 on 25 Mar 2005, 17:24, edited 2 times in total.
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 [#permalink] New post 25 Mar 2005, 11:04
Hey Baner, ain't sure if this is the right place, but could you explain the concept of range etc?

Thanks.
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 [#permalink] New post 25 Mar 2005, 11:07
kapslock wrote:
Hey Baner, ain't sure if this is the right place, but could you explain the concept of range etc?

Thanks.


range = least number in the set - biggest number in the set

mode = number which occurs maximum times in a set e.g. 1,1,1,1,2,3...mode is 1 here

median = the middle number of a set arrangged in ascending order

mean = median : when the set is of equally spaced numbers
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 [#permalink] New post 25 Mar 2005, 15:34
Why is it not C?

i mean combining both statemetns 1 and 2, we know the number of elements in the sets has to be 2.
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 [#permalink] New post 26 Mar 2005, 03:16
A) !

1) the set must consist of distinct (no repetitions) numbers: 0 2 or 2 4 => only 2 numbers can be in the set, because the difference between any two must be the same

2) insuff
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 [#permalink] New post 26 Mar 2005, 20:24
A also

With statement 1 it can only be (0,-2) or (-2,-4) or (0,2) or (2,4)
Only 2 numbers can be in this set

I am not sure about statement 2, it is not clear about the negative number and the range with this situation. I would think it is not suff
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 [#permalink] New post 26 Mar 2005, 20:57
1) We have distinct elements with difference between any two elements to be 2. Say if we have 0 and 2, can we have a third number? It can't be 4, since the difference of 0 and 4 is not 2. It can't be 1, or -2, or anything else, either. So we can only have two numbers in the set. Sufficient.

2) The range is 2 with distinct elements. We can have (0,2) or (0,1,2). Can't determine the number of elements in the set. Insufficient.

(A)
  [#permalink] 26 Mar 2005, 20:57
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