Tuesday Probability Practice

Is the following mutually exclusive or inclusive?
Probability of drawing a queen or a diamond from a standard deck of cards.

• mutually exclusive
• inclusive

A die is rolled.  What is the probability of rolling a 5 or a number greater than 3?

• 2/3
• 1/2
• 5/6
• 1

If you roll one die, what is the probability of getting an odd number or a 4?

• 2/3
• 1/3
• 1/2
• 1/6

Which of the following shows how to determine P(shaded number or number less than five)?

• 4/8 + 4/8 - 2/8
• 4/9 + 2/8 - 4/8
• 4/8 + 6/8 + 2/8
• 2/8 + 4/8 - 4/8

A bag contains 9 green marbles, 5 yellow marbles and 6 red marbles.  You choose one marble.   What is the probability of selecting a green or red marble?

• 8/15
• 6/11
• 3/4
• 2/3

Find the probability of choosing a student at random that plays an instrument OR a sport.

• 1/2
• 13/20
• 21/20
• 4/5

Which formula do you use when two events are mutually exclusive?

• P(A or B) = P(A) + P(B)
• P(A or B) = P(A) + P(B) - P(both)
• P(A and B) = P(A) * P(B)
• P (A and B) = P(A) * P(B|A)

In a standard deck of 52 cards there are 13 diamonds and 13 hearts (red) and 13 spades and 13 clubs (black).  Find the probability of choosing a card at random that is a spade OR a 7

• 1/52
• 1/13
• 4/13
• 17/52

If you roll one die, what is the probability of getting an even number or a multiple of 3?

• 1/3
• 2/3
• 1/2
• 1/6

What is the probability that a student is a female or left-handed?

• 53/121

• 58/121

• 7/53

• 12/121