Question

Let A and B be two disjoint events such that P(A) = 0.47 and P(B) = 0.3. What is P(A or B)?

Answer 1

Answer:  0.77

Work Shown:

P(A or B) = P(A) + P(B)

P(A or B) = 0.47 + 0.30

P(A or B) = 0.77

Notes:

• The formula only works if A and B are disjoint, aka mutually exclusive
• If A and B are not disjoint, then use this formula: P(A or B) = P(A) + P(B) - P(A and B)

Answer 2

Answer:

P(A or B) = 0.77

Step-by-step explanation: