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

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


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[Reveal] Spoiler: OA
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Re: Set T consists of all multiples of 5 from 30 to 225 inclusiv [#permalink] New post 22 Oct 2017, 09:00
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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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Set T consists of all multiples of 5 from 30 to 225 inclusiv

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