A formula for an average grade generator

sailor_taylor

New Member
Joined
Mar 15, 2009
Messages
20
I am looking for a formula which will tell me the "missing grade (F1)" that will, when averaged with at least two other numbers (B1 - E1), will result in my goal of the number in cell A1.

Summary:

Cell A1 is the averaged grade I want to achieve

Cells B1, C1 (and sometimes D1 and E1) are known grades

Cell F1 is the number, when averaged with B1 - E1, will give me the grade in cell A1

This ugly formula works when there are two (and only two) known grades:

=(A1*3)-(B1+C1)

Any advice will be greatly appreciated.
 

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West Man

Well-known Member
Joined
Mar 27, 2006
Messages
1,175
Working along the same line as your formula try:

=(A1*(COUNT(B1:E1)+1))-(Sum(B1:E1))
 

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