math etc Flashcards
1
Q
probability of A or B
A
probability A + probability B
2
Q
Probability of A and B
A
Prob A x Prob B
3
Q
0!
A
1
4
Q
perumations
A
(order matters) schedules, lists, order
5
Q
Combinations
A
(order doesnt matter) groups, teams
6
Q
How to find permutation
A
multiply # of slots by # of options for each slot
7
Q
How to find combinations
A
multiply # of slots by # of options for each slot, divide by factorial for # of slots
8
Q
Group problems
A
total=G1 + G2 - B + N
B=members in both groups
N=members in neither
