a trader bought 200 pens at $28 each and 10 gold pens at $4900 each, find the mean cost per pen.

Answer 1

Mean is the average of the numbers. The average is the total value divided the number of pens.

In this case the total value is ( 200 x $28 ) + ( 10 x $4900 ) = $54,600

$54600 divided by 210 pens = $260 mean cost per pen