In a room :)
Probability
Level
pending
In a room of 50 people, 30 of them knows English, 15 knows Japanese, and 10 knows both languages. How many does not know either languages?
The answer is 15.
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1 solution
30-10=20 who knows English only 15-10=5 who knows Japanese only 10 knows both languages 10+20+5=35 50-35=15