There are 100 students at school. Of those students, 60 speak English, 40 speak French, and 10 students speak neither of these two languages.Calculate how many students speak both English and French.

Answer 1

draw a Venn diagram

60 and 40 overlap. The overlap = how many speak both French & English

the universe is 60+40 - (both E and F) + 10 = 100

100 - both = 90

both = 100-90 = 10

10 students speak both French & English. 10 speak neither.