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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 :

subtomex0

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

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

where E and E' are opposite events

[tex]

P(E')=1-P(E) \\ P(E')=1- \frac{20}{31} \\ P(E')= \frac{31 - 20}{31} \\ P(E')= \frac{11}{31} \approx0.3548[/tex]

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