In a group of 25, 13 can speak Latin, 15 can speak French,
and 6 don’t speak either. How many of these speak both Latin
and French?

Answer Posted / jack

Total is 25 but out of them 6 dont speak either.
So, 25-6=19
Out of 19, 15 knows French so definately, 19-15=4 knows
exactly Latin
Out of 19, 13 knows Latin so definately, 19-13=6 knows
exactly French
Now 6+4=10 knows exactly French or Latin.
So, 19-10=9 knows both Latin and French

Easy :):):):)

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