Answer
$0.47$
Work Step by Step
These are mutually exclusive: a person cannot both be below $20$ and above $60$ at the same time.
For mutually exclusive events, $P(A\text{ and }B) = 0$, so we have: $$\begin{aligned}
P(A\text{ or }B)& = P(A) + P(B) - P(A\text{ and }B) = P(A) + P(B)\\
P("<20"\text{ or }">60")& = P("<20")+P(">60")\\
& = 30 \% + 17 \%\\
& = 0.3 + 0.17\\
& = 0.47\end{aligned}$$
