1
Q
Probability Fraction
A
Denominator=total number of outcomes
Numerator=number of outcomes that would satisfy the criteria
2
Q
Probability of Events in a Row (and)
A
Multiply the probabilities of the individual events
3
Q
Probability of One event OR the other
A
Add the probabilities of the individual events
4
Q
0!
A
equals 1
5
Q
Permutation
A
Arrangement of things in a particular order
6
Q
How to solve a permutation
A
Figure out how many slots you have
Write down the number of options for each slot
Multiply them
7
Q
Combination
A
Order does not matter
8
Q
How to solve a combination
A
Figure out how many slots you have
Fill in the slots as you would a permutation
Divide by the factorial of the number of slots
9
Q
T=G1+G2-B+N
A
T=total G1=Group 1 G2=Group 2 B=Members in both groups N=Members in neither group
GRE Quantitative Section
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