## Elementary Statistics (12th Edition)

$0.6699$, No.
We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$. Therefore $probability=\frac{2834}{169+1227+2834}=0.6699≈0.67$. No. Because it is a voluntary response survey which gives us the answers, the results are unlikely to be good, and it is likely to happen.