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01/10
Probability=
Permutation Formula
n!
(n-r)!
nPr =
Number of Favorable Outcomes
Total Number of Outcomes
Combination Formula
n!
(n-r)!r!
nCr
=
1 po
A bucket contains the names of 10 people including you and your friend.
If 2 names are randomly selected find the probability the first name
selected is yours and the second name selected is your friend's name.

0110 Probability Permutation Formula n nr nPr Number of Favorable Outcomes Total Number of Outcomes Combination Formula n nrr nCr 1 po A bucket contains the na class=