In a fraternity with 37 members, 18 take mathematics, 5 take both mathematics and chemistrychemistry, and 8 take neither mathematics nor chemistrychemistry. how many take chemistrychemistry but not mathematics?

37 students in total, there are 8 who do not take math or chemistry then there are 29 taking mathematics, chemistry or both (37-8 = 29).Now subtract this amount  those who take math and those who take both, so you have 29-18-5 = 6 only take chemistry (chemistry but not math)