Acell phone company wants to predict the probability of a seventh grader in your city, city a, owning a cell phone. records from another city, city b, indicate that of seventh graders own a cell phone.
a. assuming the probability of a seventh grader owning a cell phone is similar for the two cities, estimate the probability that a randomly selected seventh grader from city a owns a cell phone.
b. according to the data, which of the following is more likely?
 a seventh-grade male owning a cell phone
 a seventh grader owning a cell phone explain your choice.