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# Set A consists of 30 numbers, the average of which is 60. Se

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Senior Manager
Joined: 20 May 2014
Posts: 282
Followers: 18

Kudos [?]: 50 [0], given: 220

Set A consists of 30 numbers, the average of which is 60. Se [#permalink]  16 Oct 2017, 08:29
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100% (02:00) correct 0% (00:00) wrong based on 1 sessions
Set A consists of 30 numbers, the average of which is 60. Set B consists of 29 numbers, the average of which is 70.

 Quantity A Quantity B The average of Set A and B 65

(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 [?]: 344 [1] , given: 66

Re: Set A consists of 30 numbers, the average of which is 60. Se [#permalink]  16 Oct 2017, 09:21
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KUDOS
We are asked for a weighted average, thus the mean of set A and B is $$\frac{30*60+29*70}{59} = 64.92$$.

Then column B is greater
Re: Set A consists of 30 numbers, the average of which is 60. Se   [#permalink] 16 Oct 2017, 09:21
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