Estimating Probabilities of Compound Events

A 7th grade student surveyed 25 students at her school. She asked them how many hours a week they spend playing a sport or game outdoors. What is the probability of the students answering 3 hours?

Based on the bar graph, what is the probability that a dog is a person's favorite pet?

A random selection will be made from a bag containing different colored disks. Of the 25 disks in the bag, 5 are yellow. It is ___________ that a yellow disk will be randomly selected from the bag.

• Unlikely

• Likely

• Impossible

• Certain

• Equally Likely

A sock drawer has 5 pairs of white, 4 pairs of black and 6 pairs of multicolored socks. What is the probability that you choose a white pair, black pair, then a multicolor pair (throwing each pair onto the floor after choosing it)?

• 1/5 x 1/4 x 1/6

• 5/15 x 4/15 x 6/15

• 5/15 x 4/14 x 6/13

• 1/15 x 1/15 x 1/15

What is the probability of drawing a blue color and a number 4?

• 2/5

• 1/6

• 3/15

• 1/15

The sample space tree diagram for a team of three students is shown.  What is the probability that the team would consist of at least 2 girls?

• ½

• ⅜

• ¾

• ⅙

You are going to spin a spinner 3 times (that has the spaces A, B, C, D). What is the probability of spinning B on all 3 times? (Set up of work)

• 1/4 x 1/4 x 1/4

• 1/4 x 3

• 4 x 4 x 4

• 3/4 x 3/4 x 3/4

You are going to spin a spinner 3 times (with spaces A, B, C, D). What is the probability of spinning a B all 3 times?

• 1/4

• 3/4

• 1/64

• 27/64

Find the probability of getting a 1 or 2 on a die and tails on a quarter. (Which is the correct work?)

• 1/6 x 1/6 x 1/2

• 2/6 x 1/2

• 1/6 x 1/2

• 2/6 x 2

Find the probability of getting a 1 or 2 on a die and tails on a quarter.

• 1/72

• 12

• 1/12

• 1/6