Question 1123451
the probability that the first person says service is poor is 125 / 350.


given that the first person says service is poor, then you have 124 people left who say service is poor out of 349 people who are left.


the probability that the second person says service is poor, given that the first person said that service is poor, is therefore 124 / 349.


the probability that both said service is poor is therefore 125 / 350 * 134 / 349.


here's a reference you might find useful.


<a href = "http://www.probabilityformula.org/probability-without-replacement.html" target = "_blank">http://www.probabilityformula.org/probability-without-replacement.html</a>