Making Predictions Using Probability

1.   A doctor’s office concludes that, on average, 11% of patients call to reschedule their appointments per week. About how many appointments will be rescheduled out of the 240 total appointments during next week?

• 2640

• 26.4

• 21.8

• 229

A catalog store has 6% of its orders returned for a refund. About how many returns are expected out of the 16,824 sold?

• 1009.44

• 10,094.4

• 100,944

• 2804

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

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

• 20 
• 180
• 60 
• 120

In preparation for her ice cream party, Emily surveyed 35 students at Fossum Middle School about their favorite ice cream flavor. She found out that 7 of them like vanilla. If 210 students are expected to attend the ice cream party, predict how many will prefer vanilla?

• 42

• 30

• 75

• 45

Josefina pulled 3 red marbles, 5 green marbles, 8 pink marbles, and 12 yellow marbles out of a bag. If she repeats this experiment 200 times, about how many pink marbles should she expect to pull from the bag?

• 55
• 57
• 59
• 53

If 1 out of every 5 Americans ride to work with a car pool, how many people out of 2,000 would be expected to carpool?

• 500

• 400

• 300

• 200

The following table shows the results of a survey in which 50 people were asked to name their favorite sport.

Based on these results, how many people out of 1000 would you expect to pick soccer as their favorite sport?

• 240

• 120

• 250

• 225

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

• 5
• 10
• 15
• Never

What is the probability of spinning a red if we spin 30 times?

• 1/5
• 1/30
• 3/30
• 1/10