Objectives:Understand Probability and Odds

Understand Probability of Mutually Exclusive and Mutually Inclusive Events

Find the probability and odds of different situations

Standards:2.6,2.7

Probability and Odds

Situation: I have 4 green, 12 red and 6 blue marbles in a bag.If selected at random, what is the probability of selecting…

A) P(3 green) B) P(5 red) C) P(2 blue)

D) P(3 green and 4 red) E) P(4 green and 2 red and 1 blue)

How many muscles does a cat have in each ear?

Another way of measuring the chance of an event occurring

Calculations:

wanttdon

want

FP

SP

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32. The weather forecaster said that the probability of rain today is 60%. Find the odds that it will not rain today.

33. A coach said that there was a 75% chance that his star player would not play in the game. What are the odds that the player will play?

34. Given odds of 4:7, find P(S) and P(F).

35. A box contains 4 red, 3 blue, and 8 green chips. What are the odds of picking 2 green and 2 red chips? (Without replacing the chips and only picking four chips)

36. A box contains 5 red marbles and 7 green marbles. Find the probability of drawing 2 red marbles:

A)With replacement

B)Without replacement

Prob and Odds Worksheet (#15-18)

Independent Events: Events that DO NOT affect each other

Dependent Events: Events that DO affect each other

Probability of 2 Independent Events Occurring:

Probability of 2 Dependent Events Occurring:

P(B)P(A)B) andP(A A) following P(BP(A)B) andP(A

Probability of Mutually Exclusive Events

Probability of Mutually Inclusive Events

P(B)P(A)B)or P(A P(A or B)

P(A)+P(B)-P(A and B)

Worksheet

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