Question

A weather forecast states that there is an 80% chance of rain tomorrow, and an 80% chance of rain the next day too. What are the chances that it will rain on NEITHER of these two days?

2%
4% 15% 20% 40%

Answer 1

Chance of rain on both days =80%
Chance of no rain = 100%-80%
=20%
Number of days=2
Chance =(20+20)/2
=20%