Answer
$Mean=52.5$ thousand dollars.
$Median=50$ thousand dollars.
$Mode=50$ thousand dollars.
The mean increased by $2500 (2.5 thousand dollars), but the median and mode were not affected.
Work Step by Step
Adding the bonus to his salary: $75+25=100$ thousand dollars.
Now, we have:
$Mean=\frac{30+30+45+50+50+50+55+55+60+100}{10}=52.5$
$Median=\frac{50+50}{2}=50$. The mean between the fifth and sixth values.
$Mode=50$. The highest frequency.
