Since order is not important you want to compute the number of combinations of 9 items out of 12

12! 12 * 11 * 10 220

----- = --------------- =

9! 3! 3 * 2 * 1

Nikki J.

asked • 07/20/21

Kate has 12 different types of flowers but she wants to make a floral arrangement with only 9 of them. How many possible flower arrangements are there?

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Since order is not important you want to compute the number of combinations of 9 items out of 12

12! 12 * 11 * 10 220

----- = --------------- =

9! 3! 3 * 2 * 1

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