Statistics - Probability - quiz1

Question 1: What is the probability of getting heads in a fair coin flip?

1/2 1/4 0 1/3

Question 2: What is P(A or B) if P(A)=0.3 and P(B)=0.4 and they are independent?

0.7 0.12 0.70 0.58

Question 3: What does the sum of all probabilities in a sample space equal?

0.5 0 ∞ 1

Question 4: If P(A)=0.6, what is P(A')?

0.4 1.6 0 0.6

Question 5: What is the probability of rolling a 3 or 4 on a fair 6-sided die?

1/6 2/3 1/3 1/2

Question 6: If two events are mutually exclusive, what is P(A and B)?

P(A)*P(B) 1 0 P(A)+P(B)

Question 7: What is the probability of getting at least one head in 2 fair coin flips?

1/2 3/4 1 1/4

Question 8: In a standard deck of 52 cards, what is P(drawing a red card)?

1/13 1/26 1/2 1/4

Question 9: What is the probability of drawing 2 aces from a deck without replacement?

1/169 1/221 4/663 4/2704

Question 10: If P(A|B)=0.8 and P(B)=0.5, what is P(A∩B)?

0.8 0.4 0.3 1.3

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