KevinE -

The first formula I gave you works IF AND ONLY IF each name appears twice.
Unless that is an ironclad guarantee, use the second formula



"Duke Carey" wrote:

If each name appears in each list only once

=(SUMPRODUCT(--(A1:A4="John")*B1:B4)+SUMPRODUCT(--(C1:C4="John")*D1:D4))/2

If John can appear more than once per list

=(SUMPRODUCT(--(A1:A4="John")*B1:B4)+SUMPRODUCT(--(C1:C4="John")*D1:D4))/=(SUMPRODUCT(--(A1:A4="John"))+SUMPRODUCT(--(C1:C4="John"))


"KevinE" wrote:


Hello all,

I would like a formula that would find an average from two unsorted
lists.
One containing 12 months data and the other 3 months.


[a1]John [b1]26 [C1]Jack [D1]14
[a2]Fred [b2]21 [C2]John [D2]11
[a3]Jack [b3]32 [C3]Pete [D3]15
[a4]Pete [b4]24 [C4]Fred [D4]9

The averages should work out as:
John 18.5
Fred 15.0
Jack 23.0
Pete 19.5

many thanks for any help.


--
KevinE
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