MathematicsFor an event E, P(E)+P(E̲̲)=q then,

For an event E, P(E) $+$ P( $\underset{̲}{\underset{̲}{E}}) = q$ then,

Given that P(E)

+

\underset{̲}{\underset{̲}{E}}) = q

.
For an event E,
P(E)+P(

\underset{̲}{E}) = 1

.
So, the value of q =1,
So, the correct answer is

0 \leq q \leq 1

Hence, the correct option is 3.

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