Find $P ( \bar { D } )$ if $P ( D ) = 0.3$ .
A) $P ( \bar { D } ) = 0.3$
B) $P ( \bar { D } ) = \frac { 1 } { 3 }$
C) $P ( \bar { D } ) = 0$
D) $P ( \bar { D } ) = - 0.3$
E) $P ( \bar { D } ) = 0.7$

Question

Quizplus · Accepted Answer

$P ( \bar { D } )$ is the probability of not having event D occur. Since the sum of the probabilities of all possible outcomes is 1, we can find $P ( \bar { D } )$ by subtracting $P (D)$ from 1:
$$P(\bar{D})=1-P(D)=1-0.3=0.7$$
Therefore, the answer is E.

Find P(Dˉ)P ( \bar { D } )P(Dˉ) If P(D)=0.3P ( D ) = 0.3P(D)=0.3

Find $P ( \bar { D } )$ If $P ( D ) = 0.3$