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Pour la distribution de frquence suivante des scores aux examens, combien d'lves ont obtenu des scores infrieurs X = 80? X f 90-94 3 85-89

Pour la distribution de frquence suivante des scores aux examens, combien d'lves ont obtenu des scores infrieurs X = 80?

X f

90-94 3

85-89 4

80-84 5

75-79 2

70-74 1

A- Ne peut pas tre dterminer

B- 7

C- 2

D- 3

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