Probability and Inferences

Of the 255 total freshman at the high school, a random sample was taken of 75 freshmen. They were asked which lunch they prefer. The results are in the table. Predict how many in the freshman class prefer third lunch. Round to the nearest person if necessary.

• 122

• 85

• 48

• 101

Of the 255 total freshman at the high school, a random sample was taken of 75 freshmen. They were asked which class period was hardest to stay awake in. The results are in the table. Predict how many in the freshman class feel sixth period is the hardest to stay awake. Round to the nearest person if necessary.

• 68

• 51

• 7

• 48

Of the 255 total freshman at the high school, a random sample was taken of 75 freshmen. They were asked which class period was hardest to stay awake in. The results are in the table. Predict how many in the freshman class feel first period is the hardest to stay awake. Round to the nearest person if necessary.

• 68

• 51

• 7

• 48

A die is rolled once.  What is the probability of rolling a 5? Your answer should be a fraction in simplest form.

• 1/6

• 1/3

• 2/5

• 5/6

What is the probability of the spinner landing on red?

• 5/12

• 7/12

• 5/5

• 5/10 or 1/2

To play a game Benny must spin the spinner shown below. 

          What is the probability that the spinner will land on a number less than 7?

• 7/8

• 3/4

• 8/7

• 0

Mrs. Trevino has 3 red pens, 5 pink pens, and 8 blue pens. What is the probability that she will choose a blue pen to grade papers?

• 1/2

• 8

• 3/16

• 16/8

Nerissa has 5 pink bows, 1 blue bow, and 4 purple bows in a box. She will randomly choose 1 bow from the box.

What is the probability Nerissa will choose a purple bow?

• 1/2

• 2/5

• 1/10

• 3/5

A box has 6 red pens, 8 black pens, 2 blue pens, and 4 purple pens.

P(red or blue) =

• 2/5

• 3/5

• 4/5

• 1/5

A bag contains 15 yellow cubes, 6 blue cubes, and 4 red cubes. If you select a cube at random, what is the probability the cube will NOT be yellow?

• 25/15

• 2/5

• 15

• 5/3