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How many different combinations can you make out of 5 different things? |
5! = 120
! means factorial. A factorial is the product of of the positive integers and equals the number of different combinations of a number.
A factorial can be work out quite simply. Take the number 5. 5! = 5x4x3x2x1 = 120
So simply place the number you are trying to find out the combinations for first and then times it by all the numbers below.
Some more examples would be:
8! = 8x7x6x5x4x3x2x1 = 4320
3! = 3x2x1 = 6
10! = 10x9x8x7x6x5x4x3x2x1 = 3,628,800
6! = 6x5x4x3x2x1 = 720
First answer by Stupid little genius. Last edit by Stupid little genius. Contributor trust: 162 [recommend contributor]. Question popularity: 5 [recommend question]
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