If P(B/A)= 0.25 and P(A∩B) = 0.2 then P(A) will equal to _______________?
Correct answer: C. 0.8
- A. 0.05
- B. 0.75
- C. 0.8
- D. 0.45
Explanation
Using P(B|A)=P(A∩B)/P(A), substitute 0.25=0.2/P(A). Rearranging gives P(A)=0.2/0.25=0.8.
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