Weighted average of a nail is 4.947
Weighted average is the the average of a set of numbers, each with different associated weight or values called weighted average
Here given data is nail size and number of nails, percent abundance and mass of nail then we have to find weighted average of a nail = ?
To find weighted average =sum of number of nails × mass of nail / sum of all weight
Then 40.425/200 = 4.947 is the weighted average of nail
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