Since there are 3 (an odd number) ages, the median is the middle one. So, we know two of the ages are 10 and 15. In order for the mean of the three ages to be 11, their total must be 33. The total of the two known ages is 25, so the remaining one must be ...
You need to divide the total amount by $75, to see how many DVD players she could buy with the $568. 568÷75= 7 remaining 43 This means that Julia can buy 7 DVD players, and will have $43 extra dollars left over.
