SAT
Find the probability of one event in a table.
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Favorable and total
Probability = favorabletotal
Favorable is the count for the event in the question.
The total is the sum of the counts in the table.
One event
The table shows the number of students in each club.
| Club | Number of students |
|---|---|
| Art | 8 |
| Music | 12 |
| Drama | 14 |
| Robotics | 6 |
| Total | 40 |
One student is selected at random. What is the probability of Music?
The Music row shows 12 students.
The total is 40 students.
Probability = favorabletotal
= 1240
= 310
Work these three in a session.
The table shows the number of students who chose each lunch.
| Lunch | Number of students |
|---|---|
| Tacos | 9 |
| Pizza | 15 |
| Salad | 6 |
| Soup | 10 |
| Total | 40 |
One student is selected at random. What is the probability of Pizza?
The Pizza row shows 15 students.
The total is 40 students.
Probability = favorabletotal
= 1540
= 38
The Tacos row is a different event.
Answer: B. 38
The table shows the number of students for each way of getting to school.
| Way to school | Number of students |
|---|---|
| Bus | 12 |
| Car | 14 |
| Walk | 6 |
| Bike | 8 |
| Total | 40 |
One student is selected at random. What is the probability of Walk?
The Walk row shows 6 students.
The total is 40 students.
Probability = favorabletotal
= 640
= 320
The Car row is a different event.
Answer: D. 320
The table shows the number of students who chose each subject.
| Subject | Number of students |
|---|---|
| Math | 16 |
| Science | 10 |
| English | 8 |
| History | 6 |
| Total | 40 |
One student is selected at random. What is the probability of Math?
The Math row shows 16 students.
The total is 40 students.
Probability = favorabletotal
= 1640
= 25
The Science row is a different event.
Answer: A. 25
Try these five on your own.
The table shows the number of movies of each type.
| Type | Number of movies |
|---|---|
| Comedy | 12 |
| Action | 20 |
| Animated | 18 |
| Documentary | 10 |
| Total | 60 |
One movie is selected at random. What is the probability of Animated?
The Animated row shows 18 movies.
The total is 60 movies.
Probability = favorabletotal
= 1860
= 310
The Action row is a different event.
Answer: C. 310
The table shows the number of students who bought each drink.
| Drink | Number of students |
|---|---|
| Water | 10 |
| Juice | 18 |
| Milk | 14 |
| Soda | 8 |
| Total | 50 |
One student is selected at random. What is the probability of Juice?
The Juice row shows 18 students.
The total is 50 students.
Probability = favorabletotal
= 1850
= 925
The Water row is a different event.
Answer: D. 925
The table shows the number of students who chose each trip.
| Trip | Number of students |
|---|---|
| Beach | 28 |
| Mountains | 14 |
| City | 12 |
| Camp | 6 |
| Total | 60 |
One student is selected at random. What is the probability of Mountains?
The Mountains row shows 14 students.
The total is 60 students.
Probability = favorabletotal
= 1460
= 730
The City row is a different event.
Answer: B. 730
The table shows the number of snacks of each kind.
| Snack | Number of snacks |
|---|---|
| Apple | 22 |
| Crackers | 11 |
| Yogurt | 8 |
| Pretzels | 9 |
| Total | 50 |
One snack is selected at random. What is the probability of Apple?
The Apple row shows 22 snacks.
The total is 50 snacks.
Probability = favorabletotal
= 2250
= 1125
The Crackers row is a different event.
Answer: C. 1125
The table shows the number of students for each after-school plan.
| Plan | Number of students |
|---|---|
| Sports | 18 |
| Homework | 12 |
| Job | 6 |
| Club | 4 |
| Total | 40 |
One student is selected at random. What is the probability of Sports?
The Sports row shows 18 students.
The total is 40 students.
Probability = favorabletotal
= 1840
= 920
The Homework row is a different event.
Answer: A. 920
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