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How to study your flashcards.

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25 Cards in this Set

  • Front
  • Back
Rate A per B
QA / QB
Rate A per B
QA / QB
Average Rate
Total A / Total B
Average Rate
Total A / Total B
RATE CHART
R T D
P1
P2
Total
RATE CHART
R T D
P1
P2
Total
Combined Work for 2 workers
Total time = AB / A + B
Combined Work for 2 workers
Total time = AB / A + B
Combined work for many workers
1 / Total = 1 / A + 1 / B + 1 / C +....... 1 / N
Combined work for many workers
1 / Total = 1 / A + 1 / B + 1 / C +....... 1 / N
Overlapping Sets
G1 + G2 - B + N = Total
Overlapping Sets
G1 + G2 - B + N = Total
Overlapping Sets Chart
inG1 notinG1 Total
inG2
notinG2
Total
Overlapping Sets Chart
inG1 notinG1 Total
inG2
notinG2
Total
Combinations Formula
use when the selection is unordered

nCk = n! / k!(n-k)!
Combinations Formula
use when the selection is unordered

nCk = n! / k!(n-k)!
Permutation Formula
use when the selection is ordered
n! / (n-k)!
Permutation Formula
use when the selection is ordered
n! / (n-k)!
Probability Approaches
1. Multiply the probabilities of individual events.
2. Subtract the probability of the undesired outcomes from the total.
3. Solve for the probability of one possible outcome, then multiply by all the permutations of that outcome.
4. = number of desired outcomes / total number of possible outcomes
5. If the probability is simple, just count the number of possible outcomes.
Probability Approaches
1. Multiply the probabilities of individual events.
2. Subtract the probability of the undesired outcomes from the total.
3. Solve for the probability of one possible outcome, then multiply by all the permutations of that outcome.
4. = number of desired outcomes / total number of possible outcomes
5. If the probability is simple, just count the number of possible outcomes.
Percent Problems
Percent x Whole = Part
Percent More
total price = item + (% x item)
Percent Less
total price = item - (% x item)
Percent Increase
Amount of increase / Original whole
all x (100%)

New whole = original whole +or- amount of change
Percent Decrease
Amount of decrease / Original whole
all x (100%)

New whole = original whole +or- amount of change