Marc est athl\u00e8te, pendant son entra\u00eenement de ce matin, il a enregistr\u00e9 plusieurs chronom\u00e8tres sur ses 5 tours. Tour 1 = 47 sec ; T2 = 45,5 sec ; T3 = 46,3 sec ; T4 = 42 sec et T5 = 41,7 sec. <\/p>\n\n\n\n
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M = (47 + 45,5 + 46,3 + 42 + 41,7) \u00f7 5 <\/p>\n\n\n\n
M = 222,5 \u00f7 5 <\/p>\n\n\n\n
M = 44, 5<\/p>\n<\/div>\n\n\n\n
\u2714\ufe0f La vitesse moyenne de course de Marc est de 44,5 sec par tour. <\/p>\n\n\n\n
\ud83d\udc49 Calculer une moyenne sur 20<\/h4>\n\n\n\n Johanna souhaite conna\u00eetre sa moyenne de math\u00e9matiques. Pour \u00e7a, elle a besoin d\u2019additionner toutes ces notes par contr\u00f4le (C). <\/p>\n\n\n\n
C1 = 17\/20 ; C2 = 15,50\/20 ; C3 = 6\/10 ; C4 = 4\/20 <\/p>\n\n\n\n
La note du contr\u00f4le n\u00b02 n\u2019a pas le m\u00eame poids que les autres puisqu’elle n’a pas la m\u00eame proportionnalit\u00e9. Pour pouvoir calculer la moyenne, il faut qu\u2019elle transforme sa note sur 10 en note sur 20. <\/p>\n\n\n\n
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2 \u00d7 10 = 20 <\/p>\n\n\n\n
2 \u00d7 6 = 12 <\/p>\n\n\n\n
C3 = 12\/20 <\/p>\n<\/div>\n\n\n\n
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M = (17 + 15,5 + 12 + 4) \u00f7 4 <\/p>\n\n\n\n
M = 48,5 \u00f7 4 <\/p>\n\n\n\n
M = 12,13 <\/p>\n<\/div>\n\n\n\n
\u2714\ufe0f Pour l\u2019instant, la moyenne de Johanna en maths est de 12,13\/20. <\/p>\n\n\n
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