PET SURVEY
| Number of Pets | Number of Students |
| 0 | 12 |
| 1 | 16 |
| 2 | 7 |
| 3 or more | 5 |
Amy surveyed students at her school about the number of pets they have. What is the probability that a student who participated in the survey has at least 2 pets?
- A
- B
- C
- D
Show the answer
Correct answer: D
First, add the number of students for each category to find out how many total students were in the survey:
12 + 16 + 7 + 5 = 40
The number of students who had at least 2 pets are the ones who have 2 pets (7) plus the ones who have 3 or more (5). The total number of students with at least 2 pets is
7 + 5 = 12
The probability of a student in the survey having at least two pets is: