On average, how many teams competed per year in the Sprocket Invention Challenge if there were 20 teams over 2 years?

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Multiple Choice

On average, how many teams competed per year in the Sprocket Invention Challenge if there were 20 teams over 2 years?

Explanation:
Think about averages as spreading a total evenly across a number of periods. If there are 20 teams total over 2 years, the average per year is 20 divided by 2, which equals 10 teams per year. So, on average, 10 teams competed each year. If you tried 5, that would imply twice as many years to reach 20 teams; 20 would mean all 20 teams in each year (40 appearances total over 2 years); 2 would imply 40 years. The correct idea is dividing the total by the number of years.

Think about averages as spreading a total evenly across a number of periods. If there are 20 teams total over 2 years, the average per year is 20 divided by 2, which equals 10 teams per year. So, on average, 10 teams competed each year. If you tried 5, that would imply twice as many years to reach 20 teams; 20 would mean all 20 teams in each year (40 appearances total over 2 years); 2 would imply 40 years. The correct idea is dividing the total by the number of years.

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