Question

The probability that an event will happen is P(E)= 20/31 Find the probability that the event will not happen.

The probability that the event will not happen is
(Type an integer or a simplified fraction.)

Answer 1

[/tex]P(E)+P(E')=1 \\

P(E')=1-P(E)\\

where E and E' are opposite events

`</p><p>P(E')=1-P(E) \\ P(E')=1- (20)/(31) \\ P(E')= (31 - 20)/(31) \\ P(E')= (11)/(31) \approx0.3548`