Exploring Conditional Probability and Addition Rules

What does P(A) represent in probability notation?

• Probability of event A and B occurring

• Probability of event B occurring

• Probability of event A occurring

• Probability of event A not occurring

What does the squiggly line (~) in P(~A) signify?

• Probability of event A not occurring

• Probability of event A occurring

• Probability of event B occurring

• Probability of event B not occurring

What is the difference between independent and dependent events?

• Independent events affect each other, dependent events do not

• Dependent events affect each other, independent events do not

• Both types of events affect each other

• Neither type of event affects each other

How is conditional probability denoted?

• P(B | A)

• P(A or B)

• P(A | B)

• P(A and B)

What is the formula for conditional probability P(B | A)?

• P(A) / P(A and B)

• P(B) / P(A and B)

• P(A) / P(B)

• P(A and B) / P(A)

In a standard deck of cards, what is the probability of drawing a queen given that the card is red?

• 1/52

• 1/2

• 1/13

• 1/26

How many perfect square numbers are there between 1 and 100?

• 20

• 15

• 10

• 5

What is the probability of selecting a junior who did not attend prom from a group of 200 students?

• 56/200

• 7/25

• 14/50

• 28/100

What is the addition rule for probability?

• P(C or D) = P(C) + P(D) - P(C and D)

• P(C and D) = P(C) + P(D)

• P(C or D) = P(C) - P(D) + P(C and D)

• P(C and D) = P(C) - P(D) + P(C or D)

If the probability of reacting in over 0.7 seconds is 0.6, being female is 0.4, and both is 0.3, what is the probability of either event?

• 0.5

• 0.6

• 0.8

• 0.7