Corrigé du 28 P. 136

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1. $\dfrac{36+14+6}{80} = \dfrac{56}{80} = 0,7$.

2. $\dfrac{0+6}{80} = \dfrac{6}{80} = 0,075$.

3. $\dfrac{12}{80} = 0,15$.

4. $\dfrac{36}{36+12} = \dfrac{36}{48} = 0,75$.

5. $\dfrac{36}{36+14+6} = \dfrac{36}{56} \approx 0,643$.

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