Experimental and Theoretical Simple Probability

Dan rolled a number cube 20 times. The cube landed on the number 3 six times. What is the experimental probability that Dan will roll a number 3 the next time he rolls the number cube?

Dan rolled a number cube 20 times. The cube landed on the number 3 six times. Which best describes what would likely happen if Dan rolled the number cube another 80 times?

• There would be no change

• The experimental probability would get farther from the theoretical probability.

• The experimental probability would exactly math the theoretical probability.

• The experimental probability would get closer to the theoretical probability.

Sonya wrote each letter of LEDBETTER on a separate index card and put the cards in a box. She picked one letter at random, put the card back, and then repeated the experiment. If she performed this experiment 90 times, which is the best prediction for the number of times that Sonya would pick a T?

• 10

• 20

• 25

• 30

A lightbulb manufacturer found that out of 200 lightbulbs, 15 were defective. How many lightbulbs should the manufacturer expect to be defective out of 2,400 lightbulbs?

• 40

• 80

• 120

• 180

Shia conducted an experiment with a spinner. The results are shown in the table. Based on this data, how many times can Shia expect to spin a 1 in the next 20 spins?

• 8

• 7

• 5

• 3

There are 12 girls and 8 boys in Ms. Sander's class. Each da, she randomly asks one student to take attendance. in 180 school days, which is the best prediction for the number or times that the student will be a girl?

• 72

• 90

• 99

• 108

Blake tossed a coin 80 times. The coin landed on heads 60 times. What is the experimental probability that Blake will toss heads?

• 0.60

• 0.75

• 0.80

• 0.86

When playing a board game, Marisol rolled a number cube 10 times. She rolled an even number 7 times. Based on her result, what is the experimental probability Marisa will roll an odd number on her next roll?

A miniature golf course has a bucket with 7 yellow, 6 green, 3 blue, and 8 red golf balls. If Tamkia draws a ball at random from the bucket, what is the probability that she will not draw a green golf ball?

Evelyn rolls a number cube, labeled 1 through 6. Describe the likelihood of rolling a number greater than 1.

• Certain

• Likely

• Equally likely or unlikely

• Unlikely