Question

What is the average value of -2/5, 7/10, 1/2, -1/5

Answer 1

The average of numbers is equal to sum of values to number of values.

Determine the average value of observations.

`\begin{gathered} a=(-(2)/(5)+(7)/(10)+(1)/(2)-(1)/(5))/(4) \\ =((-4+7+5-2)/(10))/(4) \\ =((6)/(10))/(4) \\ =(3)/(20) \end{gathered}`

So average value of the numbers is 3/20.