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.

13 customers use to text,

10 customers use the Internet,

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

Step-by-step explanation:

A phone company surveys a sample of current customers to determine if they use their phones most often to text or use the Internet.

Plan B:

13 customers use to text,

10 customers use the Internet,

23 customers in total.

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

this answer is !

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation: