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Mathematics, 22.07.2019 13:30 winterblanco

Forty-two musicians were asked if they play the piano and/or guitar. twenty-six people played the guitar. thirty-three played the piano. nineteen said they played both the piano and the guitar.           play piano            don't play piano            total play guitar 19                      7                                26 don't play guitar 14                  ? ?                           ? ? total                      33                ? ?                           42

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