Question

if the probability that an identified hurricane will make a direct hit on a certain stretch of beach is 0.20, what are the odds against a direct hit?
1 : 0.20 I :19 i think its like this way?

Answer 1

1.0 - 0.2 = 0.8

Answer 2

The concept of odds is slightly different from probablity

the odds in favour of some event
= prob of the event happening : prob of the event NOT happening

so, prob of direct hit = .2
prob of no direct hit = .8

odds in favour of no direct hit = .8 : .2
= 8:2
= 4 : 1