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Maxoucool
@Maxoucool
January 2021
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Bonsoir, comment faire ?!
1)a) -> (-n+21)/n+4 comment je trouve n ?
1)b) -> (-20m+25)/20 comment je trouve m ?
merci
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ProfdeMaths1
Verified answer
1)a) E(X)=(-n+21)/n+4
le jeu est équitable si E(X)=0
donc -n+21=0
donc
n=21 jetons noirs
1)b) E(X)=(-20m+25)/20
le jeu est équitable si E(X)=0
donc -20m+25=0
donc
m=1,25 €
1 votes
Thanks 1
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Bonsoir, Parmi ces assertions, les quelles sont justes et les quelles sont fausses en justifiant ? Quelqu'un s'il vous plait :-( ? Juste l'explication pour le premier suffira.
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Verified answer
1)a) E(X)=(-n+21)/n+4le jeu est équitable si E(X)=0
donc -n+21=0
donc n=21 jetons noirs
1)b) E(X)=(-20m+25)/20
le jeu est équitable si E(X)=0
donc -20m+25=0
donc m=1,25 €