light, easy training on calculating hours and minutes in excel

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Average hours ignoring zeros's and error valuesHow to calculate Average in Excel:
A.
Average of numbers in a contiguos row or column
B.
Average of numbers that are not in a contiguous row or column
C.
Average Hours ignoring Zero's and Error Values

A. Average of numbers in a Contiguos Row or Column:
If your data is in cells A1:A10, type:
=AVERAGE(A1:A10)

B. Average of numbers that are not in a contiguous row or column:
If your data is in cells A1,A4 and B5, type:
=AVERAGE(A1,A4,B5)

C. Average Hours ignoring Zero's and Error Values
If you would like to get an accurate average, excluding zero's & error values, and your data is in cells A1:A10, type
=SUMIF(A1:A10,">0")/COUNTIF(A1:A10,">0")

Excel, all the time.