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paminouche
@paminouche
June 2021
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Merci de votre aide
D avance merci
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nonotata
Dans la 1ere salle 9 personnes moy d age 25 ans
25x 9 = 225
225 represente le total de leur age
dans la 2eme salle 11 personnes moyenne d age 45 ans
11x45 = 495
donc
225+495 = 720
9+11 = 20
720/20 = 36
la moyenne d age des 2 groupes reunis est de 36 ans
3 votes
Thanks 2
mathisv
Si tu suit le calcule de la moyenne 36ans car 9x25+11x45=720 11+9=20 donc 720/20=36
1 votes
Thanks 1
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Lista de comentários
25x 9 = 225
225 represente le total de leur age
dans la 2eme salle 11 personnes moyenne d age 45 ans
11x45 = 495
donc
225+495 = 720
9+11 = 20
720/20 = 36
la moyenne d age des 2 groupes reunis est de 36 ans