Probability Assessment 2

In a deck of cards, what is the probability of drawing a red card or a face card?

• 8/13

• 3/13

• 5/13

• 10/13

If P(A) = 0.6 and P(B) = 0.5, what is P(A or B) if A and B are not mutually exclusive?

• 0.3

• 0.9

• 0.8

• 1.1

A single card is chosen at random from a standard deck of 52 playing cards. What is the probability of choosing a king or a club?

• 1/52

• 16/52

• 17/52

• None of the above

Are the two events dependent or independent?

Event A: Going to school today

Event B: Going to school tomorrow

• Dependent

• Independent

Example 1: Find the probability that a woman gives birth to two children and both are boys. [Write your answer as a decimal rounded to THREE decimal places.] Hint: The probability of having a girl/boy = 0.5.

A bag contains 5 red marbles, 4 blue marbles, and 3 green marbles. Joshua will select a marble at random, record its color, and then put the marble back in the bag. He will select three marbles in this way. What is the probability that Joshua will first get a red marble, then a blue marble, and then a green marble?

A key ring has 12 keys, 3 of which open the house door. If two keys are randomly selected without replacement, what is the probability that neither key opens the door?

Nick randomly selects a digit from the set {0, 1, 2, ..., 9} and a letter from the set {A, B, C, ..., Z}. Matthew will try to guess both the digit and the letter. Which expression gives the probability that Matthew will incorrectly guess both the digit and the letter?

The ski club with ten members is to choose three officers for captain, co-captain and secretary. How many ways can those offices be filled?

• 720

• 120

• 10!

• 6

Tags

CCSS.HSS.CP.B.9

7!

• 4050
• 5400
• 5040
• 4500