Question 1189375
700 revenue with 20 participants for seminar X.
750 in revenue with 15 participants for seminar Y.


cost per person for seminar X was 700 / 20 = 35 dollars per person.
cost per person for seminar Y was 750 / 15 = 50 dollars per person.


each person for seminar Y paid 15 dollars more than each person for seminar X.