At an international conference, 100 delegates spoke English, 40 spoke French, and 20 spoke both English and French. How many delegates could speak at least one of these two languages?
90
110
120
None of these
Explanation:
According to the question,
No. of delegates spoke only English = 80.
No. of delegates spoke only French = 20.
No. of delegates spoke both = 20.
Therefore, no. of delegates spoke at least one of the language = (80 + 20 + 20) = 120.