A phone company surveys a sample of current customers Answer the questions to determine a conditional
to determine if they use their phones most often to text or probability.
use the Internet. They sort the data by payment plans, as How many customers are on payment plan B?
shown below.
customers
Plan A: 27 text, 21 Internet
How many of the customers on plan B text?
Plan B: 13 text, 10 Internet
customers
What is the probability that a randomly selected
customer who is on plan B uses the phone most ofte
to text? Give the answer in fraction form.