PROBABILITY OUTCOMES n THE POSSIBLE RESULTS OF AN

PROBABILITY

OUTCOMES n THE POSSIBLE RESULTS OF AN ACTION EXAMPLES: n There are 2 outcomes for tossing a coin (heads and tails) n There are 6 outcomes for tossing a single die (1, 2, 3, 4, 5, 6) n

EVENT n Any outcome or group of outcomes

PROBABILITY n (Book) How likely something is to occur n (Mr. Marvel) What I want to have happen divided by what could happen n Must be between 0 and 1

COMPLEMENT n The opposite of an event. n Example: The probability of rain is 45%. The complement, no rain, is 55%. n **The probability of an event plus its complement must equal 100%

HOW TO READ THE PROBLEM n P(A) is read “the probability of A happening is”

Problem #1 n The probability that a child in the United States is a twin is 2 in 90. Find P(not a twin).

Problem #2 n When tossing a single number cube (die), find the following probabilities: A. n B. n C. n D. n P(4) P(even) P(prime number) P(divisible by 3)

DECK OF CARDS You need to know the following about a standard deck of cards: n 1. There a total of 52 cards. n 2. There are 4 suits each containing 13 cards. n 3. Two suits are black, two suits are red. n 4. Face cards are Kings, Queens, and Jacks n

Problem #3 Find the probabilities for each of the following when drawing a card from a standard deck of cards. n A. P(Red) n B. P(King) n C. P(Club) n D. P(Face card) n E. P(Number card) n

ODDS The odds of something happening (or not) is:

n You have 2 quarters, 3 dimes, 1 nickel, and 4 pennies in your pocket. What are the odds that you reach into your pocket and pull out a: A. Quarter n B. Penny n C. Not a dime n

n You have 2 quarters, 3 dimes, 1 nickel, and 4 pennies in your pocket. What are the odds that you reach into your pocket and pull out a: n A. Quarter

n You have 2 quarters, 3 dimes, 1 nickel, and 4 pennies in your pocket. What are the odds that you reach into your pocket and pull out a: n B. Penny

n You have 2 quarters, 3 dimes, 1 nickel, and 4 pennies in your pocket. What are the odds that you reach into your pocket and pull out a: n C. Not a dime

ASSIGNMENT n SECTION 6. 4 A: 1 – 13, 17 - 24