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Elizabeth frank Gary and Helen are getting in line to buy lunch in the cafeteria how many different ways could they line up?
Breanna Vasquez
4 * 3 * 2 * 1 = 24 ways.
Any of them could be first (4 ways to make first), anyone except that person could be second (three ways to make second for each possible first), and so on down the line.
Michael Scalise
lenpollock
1234
1243
1324
1342
1423
1432
2134
2143
2314
2341
2413
2431
3124
3142
3214
3241
3412
3421
4123
4132
4213
4231
4312
4321
That is 24 different ways.
However, this can be reduced to 4 x 3 x 2 x 1 = 12 x 2 = 24
4 x 3 x 2 x 1 = 4!
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