Unit 6 Pre-Test: Probability

MGSE7.SP.5: Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

• A. 1/2

• B. 2/5

• C. 8/15

• D. 9/12

MGSE7.SP.6: A board game has a spinner divided into sections of equal size. Each section is labeled with a number between 1 and 5.Which number is a reasonable estimate of the number of times the spinner will land on a section labeled 5 over the course of 120 spins?

• A. 10

• B. 20

• C. 30

• D. 24

3. MGSE7.SP.8: Henry has a fair number pyramid with four faces and a spinner with three equal-sized colored sections. The possible outcomes for each are shown below.

What is the probability that the number pyramid will land on three and the spinner will stop on blue?

• A. 1/12

• B. 3/12

• C. 4/12

• D. 7/12

MGSE7.SP.7: The table shows the results of randomly selecting fish from a pond 30 times. The fish was returned to the pond after each selection. Based on these results, what is the expected probability of catching a catfish from the pond in one attempt?

• A. 0.3̅

• B. 0.1

• C. 0.16̅

• D. 0.4

MGSE7.SP.5: A bag holds 4 red marbles, 3 green marbles, 3 yellow marbles, and 2 blue marbles. You pull one without looking. The probability of pulling a green marble is ¼. What is the probability of pulling a marble that is not green?

• A. 4/3

• B. 3/4

• C. 3/12

• D. 1

6. MGSE7.SP.5: Heather flipped a coin five times, and each time it came up heads. Heather flips the coin one more time. Which is the theoretical probability that it will come up tails?

• A. 1/6

• B. 1/2

• C. 3/5

• D. 5/6

MGSE7.SP.5: Which event is neither unlikely nor likely to occur? (multiple answers may be selected)

• A. Flipping a fair coin, with sides labeled heads and tails, and the coin landing on tails

• B. Choosing a marble out of a bag, with nine blue marbles and one red marble, and the marble being red

• C. Rolling a fair number cube with faces labeled one to six, and the cube landing on a number less than six

• D. Choosing a marble out of a bag with five blue marbles and 5 black marbles, and the marble being blue

• E. Spinning the arrow on a spinner, with four equal sectors labeled one to four, and the arrow landing on an number greater than one

What is the probability that you are on Earth right now?

• 0%

• 25%

• 50%

• 100%

What is the probability that a coin will land on HEADS?

• 0%

• 25%

• 50%

• 100%

What is the probability that your brother is an elephant?

• 0%

• 25%

• 50%

• 100%