Predicting Probabilities

Based on the results shown in the table, how many white marbles would one expect to draw in a total of 50 draws? (hint:set up a proportion)

• 2

• 5

• 10

• 20

The bar graph shows the results of spinning the spinner 200 times. What is the experimental probability of landing on a 4 ?

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The table shows the results of 50 rolls of a number cube. According to the data in the table, what would be the experimental probability of rolling a 4 if you rolled the number cube 170 times? (hint: set up a proportion)

• 51

• 45

• 15

• 48

Neil tossed a 6-sided die 90 times. The results of his tosses are recorded in the table below: If Neil tossed the die 135 times, predict the experimental probability of rolling the number 3? (hint:set up a proportion)

• 21

• 45

• 28

• 14

Ichiro has a set of 20 cards that each show a different number, as shown. Ichiro will randomly select one of these cards. What is the probability that the card he selects will be a prime number? (a prime # is a number that can only be divided evenly by 1 or itself). 

• 8/12
• 1/8
• 8/20
• 10/20

Jillian rolled a number cube 360 times. About how many times do you expect her to roll a 2?

• 20 
• 180
• 60 
• 120

150 people were polled on their favorite sport. Based on the table, if you asked only 25 people what their favorite sport is, how many would say soccer is their favorite sport?

• 5 people

• 6 people

• 8 people

• 10 people

Tags

CCSS.7.RP.A.3

Fill in the blank.

Natalie is playing a game using a fair coin. Contestants win the game if the fair coin lands tails up.

If 250 contestant play the game, about __________ of them are expected to win.

Jaylon and Paula spin the pointer 30 times and get the results shown in the table.

Based on the results in the table, about how many times should Jaylon and Paula expect the pointer to land on 4 out of a total of 130 spins?

• 43

• 32

• 32.5