At sally's hair salon there are three hair stylists. 28% of the hair cuts are done by chris, 30% are done by karine, and 42% are done by amy. chris finds that when he does hair cuts, 4% of the customers are not satisfied. karine finds that when she does hair cuts, 5% of the customers are not satisfied. amy finds that when she does hair cuts, 5% of the customers are not satisfied. suppose that a customer leaving the salon is selected at random. if the customer is not satisfied, what is the probability that their hair was done by amy?

0.4449 or 44.49%

Step-by-step explanation:

The total probability of customer not leaving satisfied is given by the sum of the product of the probability of each stylist doing a hair cut by the probability of the customer not being satisfied with the cut:

The probability of Amy doing a hair cut given that the customer was not satisfied is:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18