We can calculate the average weight of a group of items using the average formula:
average = total / number
Let's call the original weight of the pumpkins T, and the original number of the pumpkins N. This would look like this:
average weight = T / N
Now we can substitute our new values:
new average weight = 10 T / (1 - .20) N
new average weight = 10 T / .8 N
new average weight = 12.5 T / N
The answer is E.
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-Jordan Wolbrum
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