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# average 4 times

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Manager
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average 4 times [#permalink]  24 Sep 2008, 01:54
explaination??
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Manager
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Re: average 4 times [#permalink]  24 Sep 2008, 01:58
1
KUDOS
D=4(JtoN)/11

Total = D+ JtoN = 15(JtoN)/11

Fraction: D/Total = 4/15
Manager
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Re: average 4 times [#permalink]  24 Sep 2008, 02:13
Total =Dec+Jan to Nov
15a= 4A+11A (no.of months x average)

december ratio =4A/15A
Manager
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Re: average 4 times [#permalink]  25 Sep 2008, 16:15
Another approac that is much easier... IMO:

say the average was 10 ... December is 4 times average so 40

december = 40 , whole year = 11(10)+1(40) = 150

Thus

40/150 .... 4/15
Re: average 4 times   [#permalink] 25 Sep 2008, 16:15
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# average 4 times

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