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A random variable X has the probability distribution
X: 1 2 3 4 5 6 7 8
p(x): 0.15 0.23 0.12 0.10 0.20 0.08 0.07 0.05
For the events E = { x: x is a prime number} and $F = {x : x < 4},$ the probability $P (E \cup F)$ is

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0.35

0.77

0.87

0.50

answer is B.

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Detailed Solution

$P (E \cup F) = P (E) + P (F) - P (E \cap F)$

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