If 20 students each require 12 ounces of plaster for an impression, how many pounds of plaster are needed in total?

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Multiple Choice

If 20 students each require 12 ounces of plaster for an impression, how many pounds of plaster are needed in total?

Explanation:
Convert the total from ounces to pounds. Multiply 20 by 12 to get 240 ounces. Since 1 pound is 16 ounces, divide 240 by 16 to convert to pounds: 240 ÷ 16 = 15. So the total plaster needed is 15 pounds. A quick check: 16 × 15 = 240 confirms the conversion is correct.

Convert the total from ounces to pounds. Multiply 20 by 12 to get 240 ounces. Since 1 pound is 16 ounces, divide 240 by 16 to convert to pounds: 240 ÷ 16 = 15. So the total plaster needed is 15 pounds. A quick check: 16 × 15 = 240 confirms the conversion is correct.

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