Ch. 12.7 Conditional Probability

Ch. 12.7 Conditional Probability

Open Ended

A red marble is selected at random from a bag of 2 blue and 9 red marbles and not replaced. What is the probability that a second marble selected will be red?

Multiple Choice

A deck contains 10 cards that are numbered 1 through 10. Alex chooses a card at random. What is the probability that the number on Alex's card is 5, given that is is a multiple of 5?

• 1/10

• 1/5

• 1/2

• 1/1

Open Ended

A number cube is rolled and the result is a number greater than 2. What is the probability that the result is 6?

Open Ended

A spinner has 12 equally sized sections numbered 1 through 12. Find the probability that the spinner lands on 11, given that the spinner lands on an odd number.

Open Ended

At Bell High School, 43% of the students own a smartphone, and 28% own a smart phone and a digital media player. What is the probability that a student owns a digital media player, given that he or she owns a smartphone?

Open Ended

The probability that a student takes Geometry and French at Satomi's school is 0.064. The probability that a student takes French is 0.45. What is the probability that a student takes Geometry if the student takes French?

Open Ended

Of the T-shirts available at a store, 54% are striped, 32% have a logo, and 13% are striped and have a logo. What is the probability that a shirt with a logo is striped?

Open Ended

In a large town, 73% of the adults are homeowners, 46% have a college degree, and 38% are homeowners with a college degrees. What is the probability that an adult with a college degree owns a home?

Open Ended

LeBron rolls a number greater than or equal to 4 on a dot cube. What is the probability that LeBron rolled a 5?

Open Ended

At a high school, the probability that a student plays basketball and football is 0.008. The probability that a student only plays football is 0.28. What is the probability that a football player also plays basketball?

Open Ended

What is the probability that the sum of two dice will be greater than 8, given that the first die is 6?

Open Ended

Two spinners are spun. Find the probability that you spin an even and C.

Open Ended

There are 10 yellow, 6 green, 9 orange, and 5 red cards in a stack of cards turned facedown. Once a card is selected, it is not replaced. Find the probability you choose a yellow card and then a green card.

Multiple Choice

From a bag of 5 red and 6 green marbles, a red marble is drawn and not replaced. Then a green marble is drawn.

• 27%

• 55%

• 25%

• 62.5%

Multiple Choice

In a game, you roll an odd number on a die and then spin a spinner with 6 evenly sized spaces numbered 1 to 6 and get an even number.

• 25%

• 50%

• 99%

• 48%

Multiple Choice

Find the probability: A black shoe is selected at random from a bin of 6 black shoes and 4 brown shoes and not replaced. What is the probability that a second shoe selected will be black?

• 5/9

• 1/3

• 1/4

• 3/4

Multiple Choice

Mina wants to buy a drink from a vending machine. In her pocket are 2 nickels, 3 quarters and 5 dimes. What is the probability she first pulls out a quarter and then another quarter?

• 0.067 = 6.7%

• 0.025 = 2.5%

• 0.43= 43%

• 0.8= 80%

Multiple Choice

In a game, a spinner with 8 equally sized sections numbered 1 to 8 is spun and a die is tossed. What is the probability of landing on an odd number on the spinner and rolling an even number on the die?

• 0.33 = 33%

• 0.25 = 25%

• 0.35= 35%

• 0.48 = 48%

Multiple Choice

A survey found that 8 out of 10 parents approved of the new principal’s performance. If 4 parents’ names are chosen, with replacement, what is the probability they all approve of the principal’s performance?

• 0.21 = 21%

• 0.35 = 35%

• 0.77 = 77%

• 0.41= 41%