Question

a phone 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? customers how many of the customers on plan b text? customers 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.

Explanation:

Step1: Find the number of customers on plan B

Add the number of customers who text and use the Internet on plan B.
$13 + 10=23$

Step2: Find the number of customers on plan B who text

From the data, it is given as 13.

Step3: Calculate the probability

The formula for probability is $P=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$. Here, the number of favorable outcomes (customers on plan B who text) is 13, and the total number of outcomes (customers on plan B) is 23. So the probability is $\frac{13}{23}$.

Answer:

23 customers
13 customers
$\frac{13}{23}$