Answer
mean is 57.8
median is 57
mode is 57
Work Step by Step
To find the mean, sum all the ages and divide the sum by the number of ages given.
$mean=\frac{57+61+57+57+58+57}{6}=\frac{347}{6}=57.8$
To find the median, list the ages in order and find the age that appears at the midpoint of the list. If the number of ages given is even, find the mean of the two ages at the midpoint of the list.
$57, 57, \underset\uparrow57, \underset\uparrow57, 58, 61$
$median=\frac{57+57}{2}=\frac{114}{2}=57$
To find the mode, identify the age that appears most often in the list.
57 is the only age repeated, so 57 is the mode.
