SAT Math Multiple Choice Practice Question 100: Answer and Explanation

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Question: 100

12. In an 11th-grade math class, five students have no pets, eight students have one pet, four students have two pets, two students have three pets, and one student has four pets. What is the average number of pets per student in this class?

A. about 1.16
B. 1.3
C. 1.55
D. about 1.73
E. none of the above

Correct Answer: B

Explanation:

B. The total number of pets is 5 × 0 + 8 × 1 + 4 × 2 + 2 × 3 + 1 × 4 = 26. The total number of students is 5 + 8 + 4 + 2 + 1 = 20. There you have it: 26 ÷ 20 = 1.3.

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