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Philidor
@Philidor
May 2019
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Bonjour vous pouviez m'aider pour ce devoir s'il vous plaît.
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calinizou
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Bonsoir
tableau
durée 5 10 20 25 30 45 50 60
effectif 2 4 4 6 4 3 1 1
moyenne 5*2+10*4+20*4+25*6+30*4+45*3+50*1+60*1=10+40+80+150+120+135+50+60=645 et 645: 25=25.8
* veut dire multiplier
: veut dire diviser
2 votes
Thanks 1
Philidor
merci beaucoup
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Verified answer
Bonsoirtableau
durée 5 10 20 25 30 45 50 60
effectif 2 4 4 6 4 3 1 1
moyenne 5*2+10*4+20*4+25*6+30*4+45*3+50*1+60*1=10+40+80+150+120+135+50+60=645 et 645: 25=25.8
* veut dire multiplier
: veut dire diviser