Answer:
18.9
Step-by-step explanation:
First, lets solve for the fractions. You can divide the fractions from the top, to their bottom (4 divided by 5, 3 divided by 5), in this case, you get 1.4. Now you have to rewrite the problem: 1.4+3.5x5. You solve it, and get 18.9.
You can find a common denominator using the two denominators multiples.
The standard deviation of the set of values (2, 3, 6, 9, 10) is <span>square root of 12.5 (</span>

) therefore
OPTION C
Use Slader.com, Find the math book and look up the page. It will show you the answer and how to get it.