(3) Out of 100 persons in a group, 72 persons speak English and 43 persons speak French. Each one out of 100 persons speak at least one language. Then how many speak only English ? How many speak only French ? How many of them speak English and French both ?
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So , the number of person who speak French and English both is 15. Also, n(A) = n(A - B) + n(A ∩ B) So , the number of person who speak only English is 57.
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