Mobile Technology in South Africa, part 2. Exercise 47 shows the results of a poll that asked about cell phone ownership in South Africa. Suppose we select three adults at random from this sample....

Mobile Technology in South Africa, part 2. Exercise 47 shows the results of a poll that asked about cell phone ownership in South Africa. Suppose we select three adults at random from this sample.

What assumption did you make in computing these probabilities?

Exercise 47