SAT Math Multiple Choice Practice Question 399: Answer and Explanation
3. A survey of Town X found an average (arithmetic mean) of 3.2 persons per household and a mean of 1.2 televisions per household. If 48,000 people live in Town X, how many televisions are in Town X ?
Correct Answer: C
C This is an excellent time to turn on your calculator. If 48,000 people live in Town X and each household has 3.2 people, you can determine the number of households: 48,000 ÷ 3.2 = 15,000. And since each household has 1.2 televisions, you can now determine the number of televisions: 15,000 × 1.2 = 18,000.