In a random sample of 30 sixth graders, 9 have 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?
To solve this problem, we can use proportions.
Let x be the number of sixth graders in the school who have traveled outside of the United States. We can set up a proportion:
9/30 = x/120
Simplifying this proportion, we get:
0.3 = x/120
To solve for x, we can cross-multiply:
0.3 * 120 = x
36 = x
Therefore, we can predict that 36 sixth graders in the school have traveled outside of the United States.
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To predict how many students have traveled outside of the United States, we can use the concept of proportion.
First, let's find the proportion of sixth graders who have traveled outside of the United States in the random sample. We divide the number of sixth graders who have traveled (9) by the total number of students in the sample (30).
Proportion of sixth graders who have traveled outside of the United States = 9/30
Next, we can use this proportion to estimate the number of students who have traveled outside of the United States in the entire school. We multiply the proportion by the total number of sixth graders in the school (120).
Estimated number of sixth graders who have traveled outside of the United States = (9/30) * 120
Calculating this expression gives us the predicted number of students who have traveled outside of the United States.