Aphone company surveys a sample of current customers to determine if they use their phones most often to text or use the internet. they sort the data by payment plans, as shown below.

plan a: 27 text, 21 internet

plan b: 13 text, 10 internet

answer the questions to determine a conditional probability.

how many customers are on payment plan b?



how many of the customers on plan b text?



what is the probability that a randomly selected customer who is on plan b uses the phone most often to text? give the answer in fraction form.