Unformatted text preview: Probability Stat 21 Hank Ibser Notation and Definitions A = an event which may or may not occur (“A”) A c = the complement, or opposite, of event A (“A complement”) P ( A ) = the probability that event A occurs (“probability of A”) P ( B  A ) = the conditional probability that event B occurs given that A occurs (“probability of B given A”) A standard deck of cards has 52 cards. There are 4 suits (spades, hearts, diamonds, and clubs) which have 13 cards each. The 13 ranks which appear in each suit are ace, king, queen, jack, and the numbers 210. Tools and Rules Here is a list of the basic ways to solve problems. You will often need to use more than one of these for a problem. 1. Counting Equally Likely Outcomes. For equally likely outcomes, P ( A ) = (# of ways that A can occur)/(total number of possible outcomes) Examples: a) the chance of drawing an ace from a deck of cards = 4/52 b) the chance that the sum of two die rolls is 4 = 3/36 (see p2389 of text) 2. Chance of the Complement (Opposite).2....
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This note was uploaded on 06/08/2008 for the course STAT 21 taught by Professor Anderes during the Spring '08 term at Berkeley.
 Spring '08
 anderes
 Statistics, Probability

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