Probability Review

While standing outside of the school waiting to go home, you notice that 3 out of every 12 students leaving school are on their cell phones.  What is the probability that the next student leaving school will NOT be on his or her cell phone?

• 25%

• 30%

• 75%

• 70%

If the spinner is spun 80 times, how many times would it land on yellow? (hint:set up a proportion)

• 10

• 20

• 30

• 40

Sara has a bag of coins. The bag contains 8 quarters, 10 dimes, 4 nickels, and 2 pennies. She will randomly select a coin from the bag. What is he probability that Sara will select a nickel?

• 1/12

• 1/3

• 1/6

• 1/5

If the spinner is spun twice, what is the probability that the arrow will land on 1 and then on 8?

• 1/8

• 1/4

• 1/64

• 1/32

P(not A) = 

• 6/8

• 3/4

• 2/8

• 1/4

What is the likelihood that an event will occur called?

• sample space

• event

• probability

• trials

If the probability of grabbing a red jolly rancher from the bucket is 4/5, predict the number of times a red jolly rancher will be grabbed if you attempt it 20 times.

• 0

• 4

• 10

• 16

What is a list of all possible outcomes of an event called?

• event

• probability

• complementary event

• sample space

What is one or a group of possible outcomes for a given situation called?

• sample space

• event

• complementary event

• probability

What is two events that when combined, contains all possible outcomes? (Example P(heads) and P(tails))

• sample space

• complementary event

• probability

• experimental probability