SOLUTION: There are 30 people in a room. Among them 11 speak French, 24 speak English and 3 speak neither French nor English. How many people in the room speak both French and English?

SOLUTION: There are 30 people in a room. Among them 11 speak French, 24 speak English and 3 speak neither French nor English. How many people in the room speak both French and English?

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Question 1076591: There are 30 people in a room. Among them 11 speak French, 24 speak English and 3 speak neither French nor English. How many people in the room speak both French and English?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
P(F or E)=P(F)+P(E)-P(Both)
We know that 3 don't speak either so 27 speak one or the other or both
27=11+24-P(Both); P (both, the double counting of them), is therefore 8.
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