in a grade 7 class, 36 students are either members of the math club or science club or both. 10 students are members of both clubs. if 31 students are members of the math club how many are members of the science club?

Answer 1

m = math only
s = science only
b = both = 10

31 = m + b = m + 10
so
m = 21

s+b = 36 - m
s + 10 = 36 - 21

s + 10 = 15 so = Answer all science students

s = 5 only science

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check
21 + 10 = 31, yes all math students
5 + 10 = 15 , yes all science students
21 + 5 + 10 = 36 = all students
5 +