Probability

A number cube, labeled 1 through 6, will be rolled one time. What is the likelihood of rolling a 6?

• Impossible

• Not likely

• Very likely

• Certain

The probability of an event is 67%.

Describe the likelihood of the event

• Certain

• Likely

• Equally likely/unlikely

• Unlikely

• Impossible

The Probability of an event is .21. Descirbe the likelihood of the event.

• Certain

• Likely

• Unlikely

• Impossible

The probability of an event is 0.74. Describe the likelihood of the event.

• Certain

• Likely

• Equally likely/unlikely

• Unlikely

• Impossible

 The cafeteria is serving three kinds of sandwiches:  tuna (T), chicken, (C), and peanut butter (P).  They are also serving a choice of two drinks:  milk (M) or water (W).  Which shows the complete set of possible combinations?

• TW,CW,PW

• TW, TM, TC, CW, PW

• TW, TM, CW, CM, PW, PM

• TCP, MW

 A spinner is spun and the results are shown in the chart. Which of the following statements is true about the probability of spinning a blue?

• The experimental probability and theoretical probability are equal.

• The experimental probability is less than the theoretical probability.

• The experimental probability is greater than the theoretical probability.

• The experimental probability cannot be determined from the data.

When calculating experimental probability, as more trials are conducted, the experimental probability generally gets closer to the theoretical probability. Eventually, the experimental probability will equal theoretical probability. 

• True

• False

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

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

What is the probability of pulling a red marble out of a jar of marbles that have 10 green marbles, 7 red marbles and 3 blue marbles?

• 1/7

• 7/20

• 7/10

• 3/10