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GARCCON
@GARCCON
June 2021
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bonjour
j'aimerais de l'aide en mathématique
merci
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winner123
Verified answer
Bonsoir
il y a 30 élèves dans la classe
20% ont 18 ans donc
30 x 20/100 = 6
6 élèves ont 18 ans donc 3 filles et 3 garçons
100/100 - 30/100 = 70/100
70% ont 17 ans soit
30 x 70/100 = 21 élèves dont 12 garçons et 9 filles
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Verified answer
Bonsoiril y a 30 élèves dans la classe
20% ont 18 ans donc
30 x 20/100 = 6
6 élèves ont 18 ans donc 3 filles et 3 garçons
100/100 - 30/100 = 70/100
70% ont 17 ans soit
30 x 70/100 = 21 élèves dont 12 garçons et 9 filles