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b. What is the probability that either 11. (10 points) It is estimated that 90% of older teens (aged 14 to 17) and 70%

b. What is the probability that either 11. (10 points) It is estimated that 90% of older teens (aged 14 to 17) and 70% of younger teens (aged 12 tc 13) own a cell phone. Suppose 55% of all teens are older teens. a. What is the probability a randomly selected teen owns a cell phone? b. Given that a teen does own a cell phone, what is the probability that he/she is a younger teen?

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