Formulas Flashcards
(10 cards)
1
Q
Fundamental Counting Principle
A
m*n
(independent events)
m = possible outcomes1
n = possible outcomes2
2
Q
Permutation (general)
A
n!/(n-r)!
3
Q
Combination
A
n!/r!(n-r)!
4
Q
Permutation (objects taken all at a time)
A
P=n!
5
Q
Permutation (number of distinguishabke permutations, can be applied to words with diff letters)
A
n!/q!r!p!
6
Q
Permutation (arranged in a circle)
A
(n-1)!
7
Q
Probability
A
ex.
P(A) = outcomes in A/outcomes in sample space
8
Q
Mutually Exclusive Events
A
P(A or B) = P(A) + P(B)
9
Q
Not mutually exclusive events
A
P(A or B) = P(A) + P(B) - P(A and B)
10
Q
complement of an event P(A’)
A
1-P(A)
