Answer:
The answer is "Option C"
Explanation:
Given:
[tex]\mu=2300\\\\\sigma=800 \ units\\[/tex]
We have [tex]D>2300[/tex] as [tex]\mu = 2300[/tex] for [tex]x=2300[/tex] or more [tex]p =50\%[/tex] as they requested [tex]2200[/tex] units to be [tex]100[/tex] more unsatisfactory. Therefore, the value is in between [tex]40.01\% \ and \ 60\%[/tex]