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3. A person is selected at random from the population of Verizon wireless subscribers. Let A be
the event that the chosen subscriber has friends or family added to his/her plan, and B denote the
event that the subscriber has unlimited text messaging. Extensive records show that: P(A)=0.37,
P(B)=0.23 and P(A U B)=0.47 Find P(A B).
Solution
NOte that
P(A n B) = P(A) + P(B) - P(A U B)
= 0.37 + 0.23 - 0.47
= 0.13 [ANSWER]

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3. A person is selected at random from the population of Verizon wir.pdf

  • 1. 3. A person is selected at random from the population of Verizon wireless subscribers. Let A be the event that the chosen subscriber has friends or family added to his/her plan, and B denote the event that the subscriber has unlimited text messaging. Extensive records show that: P(A)=0.37, P(B)=0.23 and P(A U B)=0.47 Find P(A B). Solution NOte that P(A n B) = P(A) + P(B) - P(A U B) = 0.37 + 0.23 - 0.47 = 0.13 [ANSWER]