Answer:
73
Step-by-step explanation:
x+(x+1)+(x+2)=222
x+x+1+x+2=222
3x+3=222
3x=222-3
3x=219
x=219/3
x=73
$2.85
8.55/3
The sample is large enough, representative of the entire population, and chosen randomly so the conclusion is valid.