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# Set T consists of all multiples of 5 from 30 to 225 inclusiv

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Senior Manager
Joined: 20 May 2014
Posts: 282
Followers: 15

Kudos [?]: 49 [0], given: 220

Set T consists of all multiples of 5 from 30 to 225 inclusiv [#permalink]  22 Oct 2017, 06:06
00:00

Question Stats:

42% (01:19) correct 57% (00:32) wrong based on 7 sessions
Set T consists of all multiples of 5 from 30 to 225 inclusive

 Quantity A Quantity B Mean of Set T Median of Set T

A. The quantity in Column A is greater
B. The quantity in Column B is greater
C. The two quantities are equal
D. The relationship cannot be determined from the information given

Kudos for correct solution.
[Reveal] Spoiler: OA
Director
Joined: 03 Sep 2017
Posts: 521
Followers: 1

Kudos [?]: 333 [1] , given: 66

Re: Set T consists of all multiples of 5 from 30 to 225 inclusiv [#permalink]  22 Oct 2017, 09:00
1
KUDOS
The mean of set S is computed as $$\frac{\frac{40}{2}(30+225)}{40} = 127.5$$ using the formula for the sum of an arithmetic series at the numerator. The median of S, given that S has 40 elements, is the mean of the 20 and 21 elements of the series, i.e. $$\frac{125+130}{2} = 127.5$$. Then quantities A and B are equal and answer is C
Re: Set T consists of all multiples of 5 from 30 to 225 inclusiv   [#permalink] 22 Oct 2017, 09:00
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