Investigate special weather

( 1)30×(20%+ 10%),

=30×3 10,

=9 (days);

There are nine rainy days in this area in April.

(2) 1-20%- 10%-(20%+ 10%),

= 1-60%,

=40%;

30×40%= 12 (days);

A: Sunny days account for 40% of the total days this month, which is 12 days.