Mathematics, 16.03.2022 14:00 yoyo2697

In a class of 28 pupils,13 have pencils,9 have erasers and 9 have neither pencil nor erasers. How many pupils have both pencils and erasers

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In a class of 28 pupils,13 have pencils,9 have erasers and 9 have neither pencil nor erasers. How ma...