Question

1. A survey of 25 high school students showed that 12 drove cars and 13 drove trucks. Based on the survey, if 375 students drive, how many operate a truck?

Answer 1

12 out of 25 drive cars

13 out of 25 drive trucks

We can use the rule of three:

If 12 students out of 25 drive cars then X students our of 375 drive cars:

$\frac{12}{25}=\frac{x}{375}\Longrightarrow x\text{ = }\frac{12\cdot375}{25}=\frac{4500}{25}=\text{ 180}$

For the number of students that drive trucks:

If 13 students out of 25 drive cars then X students our of 375 drive cars:

$\frac{13}{25}=\frac{x}{375}\Longrightarrow x=\frac{13\cdot375}{25}=\frac{4875}{25}=195$

Answer:

195 students drive truck