Question

In a committee 50 people speak French, 20 speak Spanish and 10 speak both Spanish and French. The number of persons speaking at least one of these two languages is

• A. 60
• B. 40
• C. 38
• D. 58

Answer 1

Answer: (A)

60

Answer 2

$n\left(S \cup F\right) = n \left(S\right) + n\left(F\right) -n\left(S \cap F\right)$ $\Rightarrow n\left(S\cup F\right) = 20 + 50-10=60$