The allowable values are;
[tex]35\text{ to 65}[/tex]
Here, we want to get the allowable values for the given information
To do this, we need to find the percentage value
That would be;
[tex]\frac{30}{100}\times50\text{ = 15}[/tex]
Now, the allowable values can be in both direction
Greater than 50 or less than 50
When greater, we add; when lesser, we subtract
Thus, we have it as;
[tex]\begin{gathered} 50-15\text{ to 50+15} \\ 35\text{ to 65} \end{gathered}[/tex]
