German only = 25 - 3 -2 = 20
French only = 15 - 3 - 4 = 8
Spanish only = 13 - 2 - 4 = 7
combos = 3 +2 + 4 = 9
onlys +combos = 44
80 - 44 = 36
Of the 80 students in class, 25 are studying German, 15 French and
13 Spanish. 3 are studying German and French; 4 are studying French and
Spanish; 2 are studying German and Spanish; and none is studying all 3
languages at the same time. How many students are not studying any of
the three languages?
3 answers
5478
36
3 answers