Question

Given the probability p=0.36 that an event will happen, how do you find the probability that the event will not happen?

Answer 1

`"Probability"(!p)=0.64`

Explanation:

An event must either occur or not occur. That is either `p` or not `p` is certain.

The probability of certainty is `100%=1`

If `"Probability"(p)=0.36`
then
`color(white)("XXX")"Probability"(p)+"Probability"(!p)=1color(white)("xxxx")` where `!p` is used to denote "not "`p`

`color(white)("XXX")0.36+"Probability"(!p)=1`

`color(white)("XXX")"Probability"(!p)=1-0.36=0.64`