Question

In a random sample of 30 sixth graders, 9 had traveled outside of the United States. There are a total of 120 sixth graders in the school. Predict how many students have traveled outside of the United States.

Answer 1

Approximately 36 sixth graders have traveled outside of the US

Answer 2

36 students have traveled outside of the United States, when there are total 120 sixth graders.

Step-by-step explanation

The number of students traveled outside of the United States is 9 when there is total 30 sixth graders. So, the ratio of the student traveled to the total students will be
`9: 30 = 3: 10`

Now there are total of 120 sixth graders in the school and lets assume the number of students traveled outside the United states is
`x` . That means the ratio...

`x: 120 = 3:10 \\ \\ (x)/(120)=(3)/(10) \\ \\ 10x=360\\ \\ x=(360)/(10) \\ \\ x= 36`

So, 36 students have traveled outside of the United States.