The quantity of people in each row is = 18
Calculation of people in each row
The total number of people in the talent show = 380
The total number of rows in the show = 21
For every one in each row to be even the total number of people should be divided by the available number of rows. That is,
380/21 = 18.1
Therefore, the quantity of people in each row is approximately = 18.
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