Try this formula
=AVERAGE(IF((A1:A5="X")*(B1:B5=--"2005-10-01")*(B1:B5<=--"2005-10-31")*(C1:
C5<0),D1:D5))
or even
=AVERAGE(IF((A1:A5="X")*(MONTH(B1:B5)=10)*(C1:C5< 0),D1:D5))
which are array formulae, so commit with Ctrl-Shift-Enter
--
HTH
RP
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"xtrmhyper" wrote
in message ...
hello to all excel expert
i want to all "D" column and get the average
criteria is in column A must be ="X"
B =10/01/05 and <=10/31/05
C <0
A B C D
X 10/01/05 0 1
X 10/01/05 0.012 6
X 10/01/05 0.012 2
o 10/01/05 0.012 1
X 11/01/05 0.012 1
--
xtrmhyper
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