Firsrt, find the total number of people that you can draw overall. To do this, add the number of people on campus and the number of people off campus to get 24 people overall. This will be your denominator. Then, the numerator is the number of the group of people that the question is asking for. In this case, it would be the 4 people off campus. Finally, put in the values to get that the probability is
For this case what we should do is find an average value of the total prices for a trip to europe We look for the average of the prices by means of the following expression: P = (20.70 + 25) / (2) P = 22.8 $ Answer: the average price is $ 22.8
