Homework Answers
13. No of people who speak exactly one language :
No of people who speak only A = 8
No of people who speak only B = 10
No of people who speak only C = 7
Therefore, total No of people who speak exactly one language = 8+10+7 =
14. No of people who speak at least one language = 60 - No of people who speak no language
No of people who speak exactly at least one language = 60 - 11 = 49
15. No of people who speak exactly two languages :
People who speak A & B = 9
People who speak C & B = 6
People who speak A & C = 4
Therefore, total No of people who speak exactly two languages = 9+6+4 = 19
16. No of people who speak none of the three languages = 11
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how many leaders competed in exactly one of the three
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how many leaders competed in foxtrot but not waltz?
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