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

00:00

Question Stats:

71% (01:09) correct
28% (00:32) wrong based on 14 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

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

1

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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]
23 Mar 2019, 16:48

1

This post received KUDOS

IlCreatore wrote:

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

Any set that is evenly distributed will have mean = median. In this case, the list os equally distributed as a multiple of 5. Ans - C

greprepclubot

Re: Set T consists of all multiples of 5 from 30 to 225 inclusiv
[#permalink]
23 Mar 2019, 16:48