Excel Date & Time Formulas

Avoiding Errors when Using the And Function to Combine Multiple Conditions in Array Formulas

Problem: The following Array formula was designed to calculate the average difference between each pair of values in columns A & B (providing both cells are not empty): {=AVERAGE(IF(AND(ISNUMBER(A1:B5),ISNUMBER(A1:B5)),A1:A5-B1:B5))} However, an incorrect result of “0″ is returned. Solution: Use the … Continue reading

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