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Need help with problem 20 and 22.

Need help with problem 20 and 22.
asked 230k views
3 votes
Need help with problem 20 and 22.

Need help with problem 20 and 22.-example-1
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User Gubbfett
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7.9k points

1 Answer

4 votes
20 is permutation
22 is counting principle
Hope it help.
answered
User Ymonad
by
8.0k points
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