Compound Probability: Addition & Multiplication Challenges

A bag contains 3 red, 2 blue, and 5 green marbles. What is the probability of randomly selecting a red or a blue marble?

• 1/3

• 3/8

• 1/2

• 2/5

In a class of 30 students, 12 play soccer, and 15 play basketball. If 5 students play both sports, what is the probability that a randomly selected student plays either soccer or basketball?

• 1/2

• 11/15

• 3/5

• 7/10

A spinner has 4 equal sections: red, blue, green, and yellow. If you spin it twice, what is the probability of landing on red both times?

• 1/16

• 1/8

• 1/2

• 1/4

A restaurant offers 3 types of salads and 4 types of dressings. If a customer chooses one salad and one dressing, what is the probability that they choose a Caesar salad and ranch dressing?

• 1/8

• 1/6

• 1/4

• 1/12

In a deck of cards, what is the probability of drawing a heart or a queen?

• 4/13

• 3/52

• 1/4

• 2/13

A school is selling tickets for a play. There are 50 adult tickets and 30 student tickets. If a ticket is chosen at random, what is the probability that it is either an adult ticket or a student ticket?

• 1.5

• 0.8

• 0.5

• 1

A box contains 6 chocolate bars and 4 candy bars. If you randomly select two bars without replacement, what is the probability that both are chocolate?

• 3/4

• 1/2

• 1/3

• 2/5

In a survey, 40% of people prefer coffee, and 25% prefer tea. If a person is chosen at random, what is the probability that they prefer either coffee or tea?

• 0.65

• 0.40

• 0.75

• 0.50

A dice is rolled twice. What is the probability of rolling a 3 on the first roll and an even number on the second roll?

• 1/4

• 1/12

• 1/8

• 1/6

A school has 200 students, 80 of whom are in the band and 50 in the choir. If 20 students are in both, what is the probability that a randomly selected student is in either the band or the choir?

• 0.75

• 0.55

• 0.65

• 0.45