Report your answer as an exact fractionSolutionfor the first

Report your answer as an exact fraction.

Solution

for the first customer will have

if customers are wells residents we have : 6 live in wells

and 16 options that is total of customers

so for the first custumer we have : 6/16

for the second customer will have 5/15

so the probability that both customers selected are wells residents is

(6/16)*(5/15) = 15/128