Respuesta :

An event must either occur (
E
) or not occur (
!
E
)
Therefore the sum of the probabilities of an event occurring and an event not occurring must be equal to 100%
That is
P
(
E
)
+
P
(
!
E
)
=
1.00
Given that
P
(
!
E
)
=
0.40

This implies that
XXX
P
(
E
)
+
0.40
=
1.00
XXX
P
(
E
)
=
0.60

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