Question

According to a recent study, cell phones are the main medium for teenagers to stay connected with friends and family (CNN, March 19, 2012). It is estimated that 90% of older teens (aged 14 to 17) and 60% of younger teens (aged 12 to 13) own a cell phone. Suppose 70 percent of all teens are older teens.
a. What is the implied probability that a teen owns a cell phone?
b. Given that a teen owns a cell phone, what is the probability that he/she is an older teen?
c. Given that the teen owns a cell phone, what is the probability that he/she is a younger teen?



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  • CreatedJanuary 28, 2015
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