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? 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.

There are 23 customers are on payment plan B.

There are 13 customers who are on plan B text.

The probability that a randomly selected customer who is on plan B uses the phone most often to text is 13/23.

Given

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 texts, 21 Internet

Plan B: 13 texts, 10 Internet

The probability is defined as the ratio of the sum of all observations and the total number of observations.

The total number of observation is;

= 13 +10 = 23

1. How many customers are on payment plan B?

There are 23 customers are on payment plan B.

2. How many of the customers are on plan B text?

There are 13 customers who are on plan B text.

3. What is the probability that a randomly selected customer who is on plan B uses the phone most often to text?

The probability that a randomly selected customer who is on plan B uses the phone most often to text is 13/23.

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Step-by-step explanation:

Assuming the categorization is mutually exclusive (customers either text or internet, but not both), the total number of Plan B customers in the sample is the sum of those in each category:

13 + 10 = 23 . . . . plan B customers

The problem statement tells you

... 23 plan B customers text

Since 13 out of 23 customers surveyed use the phone for text, the empirical probability that a plan B customer will use the phone for texting is ...

... 13/23 . . . . probability that text is used most