Question

A six-sided and a ten-sided die are both rolled. The mean and std dev for the six-sided die are $3.5$ and $1.707$. For the ten-sided die the mean and std dev are $5.5$ and $2.872$. Find the mean if the results of the two dice are added.

• A. $8$
• B. $11$
• C. $9$
• D. None of htese

Answer 1

The correct option is C $9$

Given that mean for the six-sided dice is $3.5$

Mean for the ten-sided die is $5.5$

Therefore, the mean sum will be $3.5+5.5=9$