Compound Probability STAAR Practice

• 1/2
• 1/4
• 3/8
• 3/16

• 3/4
• 1/2
• 1/8
• 1/16

The spinner is spun two times. Determine the probability of getting a red green combo.

• 1/9

• 1/10

• 2/9

• 1/12

What is the probability of the arrow stopping on “X” on the first spin and “F” on the second spin?

• 5/6

• 1/36

• 1/3

• 1/6

In a box there are 3 red pens, 2 green pens, and 1 blue pen. What is the probability of picking a red pen, replacing it, and then picking a green pen?

• 1/2

• 4/11

• 1/6

• 2/3

Two marbles are randomly drawn from a bag containing 3 purple, 1 blue, and 1 yellow marble. The first marble is blue and is not replaced. Find the probability of drawing a second marble that is purple.

• 3/5

• 3/4

• 3/20

• 2/5

What is P(A and B) if P(A) = 1/2 and P(B) = 2/7, where A and B are independent events?

• 1/7

• 1/12

• 5/8

• 1/2

What is the probability of rolling a 4 on a fair number cube and getting “tails” when tossing a coin?

• 1/7

• 1/12

• 5/8

• 1/2

What is P(A or B) if P(A) = 1/4 and P(B) = 1/2, where A and B are overlapping events?

• 1/7

• 1/12

• 5/8

• 1/2

A class has 10 girls and 15 boys. If two students are chosen at random, what is the probability that they are both girls?