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The average (arithmetic mean) of 6 positive numbers is 5. If the avera

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Math Expert
Joined: 02 Sep 2009
Posts: 49300
The average (arithmetic mean) of 6 positive numbers is 5. If the avera  [#permalink]

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13 Oct 2017, 00:15
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15% (low)

Question Stats:

91% (00:41) correct 9% (01:04) wrong based on 43 sessions

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The average (arithmetic mean) of 6 positive numbers is 5. If the average of the least and greatest of these numbers is 7, what is the average of the other four numbers?

A. 3
B. 4
C. 5
D. 6
E. 7

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Joined: 13 Jun 2017
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Re: The average (arithmetic mean) of 6 positive numbers is 5. If the avera  [#permalink]

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13 Oct 2017, 00:34
1
Sum of 6 nos.=30
Sum of least and greatest nos=14
Sum of rest 4 nos.=30-14=16
Average=16/4=4

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Re: The average (arithmetic mean) of 6 positive numbers is 5. If the avera &nbs [#permalink] 13 Oct 2017, 00:34
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