The diagram shows the languages spoken by the staff of a bank branch in Patna; the number outside the circles speaks neither. How many staff speak at least one of the two languages?

Question

Accepted Answer

45. At least one = every part inside the circles: 15 + 9 + 21 = 45. 50 also adds the 5 outside, 54 counts the 9 twice (once for each circle), and 36 counts only those who speak exactly one language.

The diagram shows the languages spoken by the staff of a bank branch in Patna; the number outside the circles speaks neither. How many staff speak at least one of the two languages?

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