Howard is playing a carnival game. The object of the game is to predict the sum you will get by spinning spinner A and then spinner B. Howard predicts.

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Presentation transcript:

Howard is playing a carnival game. The object of the game is to predict the sum you will get by spinning spinner A and then spinner B. Howard predicts he will get a sum of 5. 1)List the sample space. 2)What is the probability Howard gets a sum of 5? 3)Suppose that Howard gets a 3 on Spinner A, what is the new probability of him getting a sum of 5? 3/12 or 1/4 1/3

Homework Review

Conditional Probability

Conditional Probability contains a condition that may limit the sample space for an event. You can write a conditional probability using the notation - This reads “the probability of event B, given event A”

The table shows the results of a class survey. Find P (own a pet | female) The condition female limits the sample space to 14 possible outcomes. Of the 14 females, 8 own a pet. Therefore, P(own a pet | female) equals Do you own a pet?YesNo Female86 Male57

The table shows the results of a class survey. Find P (wash the dishes | male) The condition male limits the sample space to 15 possible outcomes. Of the 15 males, 7 did the dishes. Therefore, P(wash the dishes | male) 7 15 Did you wash the dishes last night? YesNo Female76 Male78

Using the data in the table, find the probability that a sample of not recycled waste was plastic. P (plastic | non-recycled) The probability that the non-recycled waste was plastic is about 13%. = P(plastic | non-recycled) = MaterialRecycledNot Recycled Paper Metal Glass Plastic Other

Classwork Practice Worksheet

Homework Practice Worksheet