In a donation drive carried out by a group of 45 volunteers, the amount of money collected are shown

Question

In a donation drive carried out by a group of $45$ volunteers, the amount of money collected are shown in the table below.

Amount collected ($\$w$)	$0<w\le 20$	$20<w\le 40$	$40<w\le 60$	$60<w\le 80$	$80<w\le 100$
Number of volunteers	$8$	$18$	$9$	$5$	$5$

Estimate the mean amount of money collected by each of the $45$ volunteers.

Accepted Answer

$\$41.56$ (2 d.p.)

Mean of Grouped Data