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The simple Excel function that decides if your formula spills or returns one value

For decades, Excel worked on a simple principle: you enter a formula into one cell, and it returns a single result into that ...
HowToGeek on MSN

How to Use the AVERAGEIF and AVERAGEIFS Functions in Excel

Excel's AVERAGEIF and AVERAGEIF functions let you find the average of a set of data. However, where they differ from the more ...