Mathematics, 25.08.2020 17:01 EmmaPreston43
This year, 40 students have each travelled by one or more of plane (P), train (T) or boat (B). 7 have travelled only by plane. 11 have travelled only by train. 9 have travelled only by boat. n( P+T)= 8 n (B+T) = 3 n( B+T) = 6. (the plus represents “intersection” symbol) Please help
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This year, 40 students have each travelled by one or more of plane (P), train (T) or boat (B). 7 hav...
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