Question

A group of students were asked about there majors. Let B = Biology Majors M= Math Majors. Given r1 = 47r2 = 12r3 =4r4 = 7

Answer 1

(a) A total of 66 students were surveyed

(b) Those who are Math majors and not biology majors were 7

(c) Those who were neither math nor biology majors were 47

(d) Those who majored in both math and biology were 4