Answer:
m = 88
Step-by-step explanation:
The mean of a set of data is calculated using the formula
mean = [tex]\frac{sumofdata}{count}[/tex]
hence
[tex]\frac{12+10+7+8+m}{5}[/tex] = 25 ( multiply both sides by 5 )
37 + m = 125 ( subtract 37 from both sides )
m = 88
