Understanding Probability Concepts

What is the probability of event B given event A if events A and B are independent?

• The probability of A

• The probability of B

• The probability of A and B

• The probability of A or B

How can the probability of A given B be expressed for independent events?

• As the probability of A

• As the probability of B

• As the probability of A and B

• As the probability of A or B

How do you find the probability of two independent events occurring together?

• Subtract the probabilities of each event

• Multiply the probabilities of each event

• Divide the probabilities of each event

• Add the probabilities of each event

What is the probability of not B if the probability of B is 3/4?

• 1/3

• 1/4

• 1/2

• 1/5

How is the probability of A or B (union) calculated?

• Add the probabilities of A and B

• Divide the probabilities of A and B

• Subtract the probability of A and B from the sum of probabilities of A and B

• Multiply the probabilities of A and B

If the probability of A is 2/5 and the probability of A and B is 3/10, what is the probability of B?

• 1/4

• 1/2

• 3/4

• 3/5

What is the probability of A if the probability of not A is 3/5?

• 3/5

• 2/5

• 4/5

• 1/5

How do you calculate the probability of B given A if you know the probability of A and B?

• Subtract the probability of A from the probability of A and B

• Divide the probability of A and B by the probability of A

• Multiply the probability of A and B by the probability of A

• Add the probability of A to the probability of A and B

What is the probability of A if the probability of A union B is 0.72 and the probability of B is 0.45?

• 0.27

• 0.18

• 0.72

• 0.45

If the probability of B given A is 0.4, what is the probability of A and B?

• 0.32

• 0.24

• 0.16

• 0.36