Question

select the correct choice that completes the sentence below.

for any event a, p(a) + p(not a) =

2.
1.
0.
0.5.

Explanation:

Identify the probability rule

$$ P(A) + P(\text{not } A) = P(A) + P(A^c) $$

Apply the complement rule

$$ P(A) + P(A^c) = 1 $$

Answer:

• 2.
• 1. (Correct answer)
• 0.
• 0.5.