Answer
$Mean=52.5$ thousand dollars.
$Median=\frac{52.5+52.5}{2}=52.5$ thousand dollars.
$Mode=52.5$ thousand dollars.
Each of them increased by $2500 (2.5 thousand dollars).
Work Step by Step
Let's add the bonuses:
$30+0.05\times30=31.5$
$30+0.05\times30=31.5$
$45+0.05\times45=47.25$
$50+0.05\times50=52.5$
$50+0.05\times50=52.5$
$50+0.05\times50=52.5$
$55+0.05\times55=57.75$
$55+0.05\times55=57.75$
$60+0.05\times60=63$
$75+0.05\times75=78.75$
$Mean=\frac{31.5+31.5+47.25+52.5+52.5+52.5+57.75+57.75+63+78.75}{10}=52.5$
$Median=\frac{52.5+52.5}{2}=52.5$. The mean between the fifth and sixth values.
$Mode=52.5$. The highest frequency.
