Probability Review

The chart below shows the gumball colors in a machine and the probability of getting each color gumball out of the machine. Which color gumball is least likely to come out of the machine?

• red

• yellow

• green

• purple

There are four colors of pencils in a large box. John will randomly select a pencil from the box. The table below shows the probability of selecting each color. What color will John most likely select?

• Blue

• Red

• Yellow

• Green

Denise found errors on 6 of the 300 pages she has read. What is the probability that she finds an error on the next page she reads?

• 0.02%

• 0.016%

• 1.6%

• 2 %

Wilson is planning to randomly select colored cubes from a bag containing 60 cubes. The table below shows the number of colored cubes in the bag. To the nearest hundredth, what is the probability that the first cube he draws is blue or green?

• 0.60

• 0.183

• 0.36

• 0.40

A fair, six-sided die is rolled twice. A list of possible results is shown below. What is the probability that the sum of the numbers rolled equals 7 ?

Ranee creates a spinner with 18 equal sections. She colors 5 of the sections orange, 6 of the sections brown, 2 green, 3 blue, and 2 yellow. What is the probability that the arrow on the spinner will land on a brown section?

Mr. Ochoa’s math students read a 2010 census report on the highest level of education attained by citizens of the United States. The table includes some of this data. The students conduct their own survey of 200 randomly selected adults. Based on the census data, which is the most reasonable prediction for the number of adults they survey who have some Bachelor's degree as their highest level of education?

• 128

• 77

• 65

• 41

A principal randomly chose 40 students from grade 5. Of these students, 9 were wearing watches. Based on this information, what is the most reasonable prediction of the number of students wearing watches in a group of 120 students from grade 5?

• 27
• 9
• 18
• 80

A dice (numbered 1-6) is rolled 20 times.  How many times will a number less than 4 show?

• 5
• 10
• 15
• Never

If I flip a coin 10 times how many times should I get heads?

• 1
• 10
• 3
• 5