Probabilty

A die is rolled. The probability of getting an even number is:

• 0.5

• 0.25

• 0.8

• 
  0.54

If the probability of an event A is 0.7, then the probability of not A is:

• 0.5

• 0.3

• 
  1

• 
  0.7

The prior in Bayesian inference is defined as...

• A) Evidence from data
  

• 
  B) Updated belief after seeing data
  

• C) Initial belief before data
  

• 
  D) Marginal probability

Two dice are rolled together. The probability of getting a sum of 7 is:

• 1/6

• 1/12

• 1/18

• 1/36

A coin is tossed 3 times. The probability of getting at least one head is:

• 1/8

• 3/8

• 7/8

• 1/2

A card is drawn at random. The probability of getting a black king is:

• 1/26

• 1/52

• 1/13

• 1/12

If two events A and B are independent, then P(A∩B) equals:

• P(A)+P(B)

• P(A)−P(B)

• P(A)×P(B)

• P(A)/P(B)

A bag contains 3 red and 2 green balls. Two balls are drawn without replacement. The probability that both are red is:

• 3/10

• 2/10

• 1/5

• 6/10

The sum of probabilities of all possible outcomes of a random experiment is always:

• 0

• 0.5

• 1

• Depends on the experiment

If a card is drawn at random, the probability of it being a face card (J, Q, K) is:

• 1/4

• 9/52

• 3/13

• 1/13