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.

-13/23 is the probability a customer on plan B will text

Step-by-step explanation:

Assuming the categorization is mutually exclusive,  (customers either text or internet, but none of them both) the final number for Plan B customers in the sample is the sum of the ones in each section.

plan B customer are 13+10=23

The problem tells you that 23 plan B customers do text.

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

Hope this helps!

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6