Urne 1

(V), (J), (J), (J), (V), (R), (J), (J), (J)

Dans une urne, nous avons 6 boules jaunes (J), 2 boules vertes (V), et 1 boule rouge (R), indiscernables au toucher.

Quelle est la probabilité de tirer une boule jaune (J)?

La probabilité (sous forme de fraction) =

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