Probability Statistics Review

If an event can occur with a probability of 24/25, then we say the likelihood of the event occurring is:

• certain

• impossible

• unlikely

• likely

If an event can occur with a probability of 3/8, we can say the likelihood of the event occurring is:

• impossible

• certain

• unlikely

• likely

What is the likelihood of flipping heads on a coin?

• impossible

• unlikely

• equally likely

• certain

If a six-sided die is rolled, what is the probability that it will land on an odd number?

At a community swimming pool there are 2 managers, 8 lifeguards, 3 concession stand clerks, and 2 maintenance people.  If a person is selected at random, find the probability that the person is either a lifeguard or a manager.

• 2/3

• 8/15

• 2/15

• 1/5

At a community swimming pool there are 2 managers, 8 lifeguards, 3 concession stand clerks, and 2 maintenance people.  If a person is selected at random, find the probability that the person NOT a maintenance person.

• 2/15

• 1/5

• 2/3

• 13/15

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? (Please make sure the fraction is in lowest terms).

• 5/6

• 1/2

• 1/3

• 1/6

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

• 5/11

• 5/6

• 1/3

• 5

A bag has 3 red marbles, 2 blue marbles, 4 green marbles, and 1 yellow marble. What is the likelihood of reaching into the bag and pulling out an orange marble?

• certain

• impossible 

• unlikely 

• equally likely 

A bag has 3 red marbles, 2 blue marbles, 4 green marbles, and 1 yellow marble. What is the probability of reaching into the bag and pulling out a marble that is NOT blue? (Please make sure your fraction is in lowest terms).