Mathematics, 24.06.2021 14:00 tfyvcu8052
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1. In a class of 28 pupils, 13 have pencils, 9 have erasers and 9 have neither pencils nor erasers. How
many pupils have both pencils and erasers?
2. A universal set, U consists of prime numbers with P and Q as subsets of U. If P and Q are given by
P = {n: 3(n + 1) = 2(n + 10)}, and Q = {n: 7<n<31}, list the elements of P n Q.
Answers: 2
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1. In a class of 28 pupils, 13 have pencils, 9 have erasers and 9 have neither...
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