Sect. 12-4 Probability. Def: Probability is the measure of the chances of an event happening A desired outcome is called a success Any other outcome is.

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Presentation transcript:

Sect Probability

Def: Probability is the measure of the chances of an event happening A desired outcome is called a success Any other outcome is called a failure The probability of success is given by The probability of failure is given by

Def: If an event can not fail then P(s) = 1 Def: If an event can not succeed then P(s)=0 The sum of P(s) + P(f) =

1. If

2.A bag of m & m’s contains 12 red, 11 yellow, 5 green, 6 orange, 5 blue, and 16 brown candies. What is the probability of choosing a yellow at random?

3.A bag contains 6 white, 3 blue and 7 green marbles. What is the probability of choosing a) white b) marble is not green

Def: The odds of a successful outcome is the ratio of the number of ways it can succeed to the number of ways it cant fail. given: s : f 4.Find the odds of rolling two dice totaling 7 4.If the probability is ¾ find the odds.

6.If the odds are 6 : 5 find the probability 7.A bag contains 1 green, 4 red and 5 yellow balls. Two are selected at random. Find the probability that 2 are red?

8.What is the probability of choosing the million dollar case on ? 9.What are the odds of choosing the million dollar case on Deal or No Deal?

Assignment: Practice 12-4