Experimental Probability Review

The table shows the number of trees of different heights at a campground. What is the fractional probability that when a tree under 10 feet tall is selected at random, it is a cedar tree?

Neil tossed a 6-sided die 90 times. The results of his tosses are recorded in the table below: Which number has the experimental probability of 13/90?

• 1

• 2

• 3

• 4

• 5

The table shows the results of 50 rolls of a number cube. According to the data in the table, what was the experimental probability of rolling a 1?

Andrew picks one marble at a time from a box and replaces it. He repeats this process 25 times and records the results in the table. Based on the table, which color marble has an experimental probability of 1/5?

• Yellow

• Red

• Blue

• Green

The spinner shown is spun. 
Find P(number less than 6).

• ⁶/₈ or 75%
• ¹/₈ or 12.5%
• ⁵/₈ or 62.5%
• ³/₈ or 37.5%

A bag of markers has 4 red markers, 5 blue markers, 3 yellow markers, and 3 green markers. If Maria pulls out a marker without looking, what is the probability he will NOT pull out a blue marker?

• 5/10
• 1/3
• 4/15
• 2/3

In a random survey of 50 students at Great Middle School, 32 said chocolate was their favorite flavor of yogurt. The school has 450 students. How many of them are likely to select chocolate as their favorite flavor? 

• 144
• 162
• 225
• 288

Tags

CCSS.7.RP.A.3

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

Tags

CCSS.7.RP.A.3

100 second graders were asked to do a book report about one of these four zoo animals.  The number of students who chose each animal is shown in the table.  If 250 second graders had to choose of of the four animals, predict how many would choose to write about a giraffe.

• 60 students
• 50 students
• 40 students
• 30 students

Tags

CCSS.5.OA.B.3

What is the probability of choosing a green marble?

• Certain

• Likely

• Unlikely

• Impossible