7. 7. A utility company asked
50 of its customers whether
they pay their bills online or
by mail. What is the
probability that a customer
pays the bill by mail, given
that the customer is female?
Online
By
Mail
I
Male
Female
12
24
INILA

Probability that a customer pays the bill by mail, given that the customer is female is 0.20.

Step-by-step explanation:

The complete question is:

                               Online                             By Mail            Total

             Male             12                                      8                   20

           Female           24                                     6                   30      

             Total             36                                     14                  50    

A utility company asked 50 of its customers whether they pay their bills online or by mail. What is the probability that a customer pays the bill by mail, given that the customer is female.

Probability that a customer pays the bill by mail, given that the customer is female is given by = P(Pays bill by mail / Customer is female)

P(Pays bill by mail/Customer is female) =

Now, Probability that customer is female =  

Also, Probability that customer pays bill by mail and is female =  

So, Required probability =  

                                         =  

                                         =     =  0.20

Hence, probability that a customer pays the bill by mail, given that the customer is female is 0.20.