# Shared Flashcard Set

## Details

math 3c
up to midterm 1
21
Mathematics
10/24/2009

Term
 multiplication principle
Definition
 total # of outcome = multiplication of all possible outcomes
Term
 permutation
Definition
 order mattersn!/(n-k)!
Term
 combination
Definition
 order doesn't mattern!/((n-k)!k!)-has the "deordering" agent
Term
 disjoint/ mutually exclusive
Definition
 unrelated events
Term
 conditional probability
Definition
 - an event based on a an event that already occured-prob. where we condition on some previous knowledgeP(AIB)=p(A intersect B)/ P(B)
Term
 "and"& " or"
Definition
Term
 "at least"
Definition
 situation 1+ situation 2+ ... untill all possible choices are exhausted
Term
 law of total probability
Definition
Term
 independence
Definition
 =unrelated eventsP(A intersect B) =P(A)P(B), such that P(BIA)=P(B)
Term
 pairwise independence
Definition
Term
 bayes formula
Definition
Term
 mass distribution function/ probability mass function
Definition
 -make a chartchance that a X=x, where big X is the random variable.
Term
 cumulative distribution function
Definition
 F(x)=P(X less than or equal to x)
Term
 discrete random variables
Definition
 -countably infinite number of variable
Term
 continuos random variables
Definition
 -a continuous range of variables... allowed to take any in between numbers
Term
 sample space
Definition
 all the possible outcome
Term
 de morgans laws
Definition
 complementaries of (a intersect b)and of (a union b)
Term
 stars and bars
Definition
Term
 pairwise disjoint
Definition
 set of 2 that don't intersect any other set of 2 things
Term
 probability
Definition
 the chance of an event occuringvalue between 1 and 0
Term
 random variable
Definition
 p(x)=P(X=x) which is greater than or equal to zero. sum of all p(x)=1
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