Statisticsmedium · Past Paper
If P(A) = 2/3 and P(not A) = x/9, what is the value of x?
A3
B2
C1
D6
✓ Correct Answer: A — 3
P(not A) = 1 - 2/3 = 1/3. 1/3 = x/9 => x = 3.
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