Question

1. two out of every 3 students in mr. pearson’s ninth grade class recycle aluminum cans. if 48 students recycle aluminum cans, how many students are in mr. pearson’s class?

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answer:

1. cindy’s job is to check computer printers for defects. out of 420 printers she has to check, only 3 of the first 84 have been defective. using this information, what is the best prediction of the total number of printers in this group that will be defective?

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Explanation:

For Question 8:

Step1: Find ratio of recyclers

$\frac{2}{3}$

Step2: Multiply by total students

$48 \times \frac{2}{3}$

Step3: Calculate the result

$48 \times \frac{2}{3} = 32$

Step1: Find defect ratio

$\frac{3}{84} = \frac{1}{28}$

Step2: Multiply by total printers

$420 \times \frac{1}{28}$

Step3: Calculate the result

$420 \times \frac{1}{28} = 15$

Answer:

32

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For Question 9: