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Question is

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 is a prime number} and F = {X < 4}, the probability P (E ∪ F) is

  • 0.87

  • 0.77

  • 0.35

  • 0.50

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