Probability Quiz for Feb. 3rd

What is the probability that an event will not occur?

• 1 minus the probability of the event occurring

• The probability of the event occurring

• The sum of the probabilities of all possible events

• The probability of the event occurring squared

How do you find the probability of one event or a second event occurring?

• Add the probabilities of both events

• Multiply the probabilities of both events

• Subtract the probability of both events

• Divide the probability of both events

What does it mean to understand and use odds?

• To calculate the likelihood of an event occurring

• To determine the exact outcome of an event

• To ignore the probability of an event

• To ensure an event will not occur

What is the probability of not being dealt a queen from a standard 52-card deck?

• 1/13

• 12/13

• 1/4

• 3/4

What does it mean for two events to be mutually exclusive?

• They can occur at the same time.

• They cannot occur at the same time.

• They are dependent on each other.

• They have the same probability.

What is the formula for calculating the OR probability of events that are not mutually exclusive?

• P(A or B) = P(A) + P(B)

• P(A or B) = P(A) + P(B) - P(A and B)

• P(A or B) = P(A) - P(B)

• P(A or B) = P(A) + P(B) + P(A and B)

What is the probability of rolling a 2 on a single six-sided die?

• 1/6

• 1/3

• 1/2

• 1/4

What is the probability that a horse will win a race if the odds in favor are 2 to 5?

• 2/7

• 2/5

• 5/7

• 7/2

If an event is certain to occur, what is its probability?

• .25

• .5

• 1

• 0

What is the sample space when a die is rolled once?

• {1,2,3,4,5,6}

• {2,3,4,5,6}

• {1,2,3,4,5}

• {1,2,3,4}