To count the number of birthdays by year, you can use a formula based on the SUMPRODUCT and YEAR functions. In the example shown, E5 contains this formula: =SUMPRODUCT(--(YEAR(data[Birthday])=E5)) where data is an Excel Table in the range (C5:B16). …Read more
The Excel UNIQUE function extracts unique values from a range or array. The result is a dynamic array that automatically updates when source data changes. UNIQUE is not case-sensitive and works with text, numbers, dates, and other data types.Read more
Combinations and permutations are two basic ways to count possibilities, used in probability, statistics, games, passwords, and lotteries. This article explains the difference between them, when order and repetition matter, and the Excel functions you can use to calculate each case: FACT, PERMUT, …Read more
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