Probability Review

What is the probability of spinning green?

• 0
• 1/4
• 1/2
• 3/4

What is the probability of spinning an even number?

• 16 2/3%

• 33 1/3%

• 50%

• 75%

Which event is not a dependent event?

• Picking 2 students to each be line leader and door holder from a group of 20 students
• Picking 2 marbles from a bag without replacing the first marble
• Picking 2 crayons from a box at the same time (simultaneously) 
• Picking an earring, replacing it, then picking a 2nd earring

You flip a nickel three times.
Find the probability that all flips will land on tails.

• 1/2
• 1/4
• 1/6
• 1/8

You spin this spinner 3 times.
Find the probability of these 3 events.
P(red, odd, 3)

• 1/216
• 1/72
• 1/36
• 1/12

A store sells shirts that are either small, medium, or large. The colors are either red, blue, green, or white. What is the probability someone will select a large green shirt?

• 1/3
• 1/7
• 1/9
• 1/12

In a drawer, there are 6 white socks, 4 black socks, and 2 brown socks. You pick out a sock, replace it, then pick out a 2nd sock. What is the probability that you will pick a brown, then black sock?

• 1/11

• 1/18

• 1/36

• 2/33

You pick a marble from this bag.
What is the probability you will choose either a black or white marble?

• 3/5
• 9/100
• 1/10
• 2/5

You roll two die.
What is the probability you will roll a 4, then roll a number less than 3?

• 1/36
• 1/18
• 1/9
• 1/6

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6
• 1/2
• 1/3
• 1/6