Answer:
x = 26
Step-by-step explanation:
The mean is calculated as
mean = [tex]\frac{sum}{count}[/tex]
given mean is 21 , then
[tex]\frac{x+16}{2}[/tex] = 21 ( multiply both sides by 2 to clear the fraction )
x + 16 = 42 ( subtract 16 from both sides )
x = 26
