AP Statistics - General Addition Rule

A recent study of a metropolitan area found that 31% of people owned a SUV, 74% of people surveyed owned a car, and 10% owned both. What's the probability that a randomly chosen person owned a SUV or a car?

• 85%

• 95%

• 5%

• 15%

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CCSS.HSS.CP.B.7

Which of the following shows how to determine P(skateboard or rollerblades)?

• 48/100 + 42/100 - 39/100
• 39/100 + 3/100 - 49/100
• 49/100 + 9/100 - 3/100
• 9/100 + 3/100 - 39/100

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CCSS.HSS.CP.B.7

find the probability of choosing a student at random that plays an instrument OR a sport

• 1/2
• 13/20
• 21/20
• 4/5

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CCSS.HSS.CP.B.7

The table above displays the 100 senators of the 112th U.S Congress on January 5, 2011, classified by political party affiliation and gender. A senator is selected at random from this group. Compute the following probability: The senator is an Democrat or an Independent.

• .42

• .53

• .002

• .50

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CCSS.HSS.CP.B.7

A poll was taken of 121,973 people in the United States aged 15-44 to determine their health insurance status. The participants were classified by gender and by type of insurance coverage. The results were as follows. A person is selected at random. Compute the following probability: The person has private insurance or medicaid.

• .8417

• .0781

• .7657

• .6876

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CCSS.HSS.CP.B.7

Thirty-two percent of families residing in a rural, farming town own a goat and 41% of families own a dog. Twenty-four percent of families own both types of animals. If a family from this town is chosen at random, what is the probability that it owns either a goat or a dog?

• 0.15

• 0.33

• 0.49

• 0.97

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CCSS.HSS.CP.B.7

The table above displays the 100 senators of the 112th U.S Congress on January 5, 2011, classified by political party affiliation and gender. A senator is selected at random from this group. Compute the following probability: The senator is a Democrat or a female.

• .42

• .56

• .47

• .53

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CCSS.HSS.CP.B.7

To win a prize in a game, a player must throw a ball into a basket or kick a ball through a goal.

• The probability that the player will throw the ball into the basket is 0.30.

• The probability that the player will kick the ball through the goal is 0.20.

• The probability that the player will throw the ball into a basket and kick the ball through the goal is 0.06.

What is the probability that the player will either throw the ball into the basket or kick the ball through the goal, but NOT both?

• 0.04

• 0.44

• 0.50

• 0.56

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CCSS.HSS.CP.B.7

If P(A) = 0.24, P(B) = 0.41, and P(A and B) = 0.18, what is P(A or B)?

• 0.17

• 0.47

• 0.59

• 0.65

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CCSS.HSS.CP.B.7