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What was the average (arithmetic mean) monthly rainfall

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Eternal Intern
Joined: 07 Jun 2003
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What was the average (arithmetic mean) monthly rainfall [#permalink]  22 Jul 2003, 19:57
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5% (low)

Question Stats:

100% (01:34) correct 0% (00:00) wrong based on 1 sessions
What was the average (arithmetic mean) monthly rainfall during 1984 in region Y?

(1) In region Y the total rainfall for the first 6 months of 1984 was twice the total rainfall for the last 6 months of 1984.
(2) In region Y the average monthly rainfall for the first 6 months of 1984 was 2.31 inches more than the average monthly rainfall for the last 6 months of 1984.

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Joined: 10 Jun 2003
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Location: Maryland
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C

(1) Could be any two numbers X and 2X
(2) Could be any two X and X + 2.31

Need to combine the two to get the first 6 months is 4.62 EACH and the second 6 months is 2.31 EACH. This is suff.
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