Traditional Culture Encyclopedia - Weather forecast - Hand-made meteorological turntable

Hand-made meteorological turntable

There are two events in each of the two dials. Is it raining?

The probability of rain in AB is different, which is shown on the plate.

The sector area of disc A representing the color of rainfall accounts for 20% of the whole disc.

The fan-shaped area of disc B, which represents the color of rainfall, accounts for 50% of the whole disc.

(2) Recording by rotating two disks at the same time.

Can you solve your problem?