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Mathematics 9 Online
OpenStudy (anonymous):

Two urns each contain blue balls and white balls and urn 1 contains four blue balls and three white balls and urn 2 contains five blue balls and six white balls. A ball is drawn from each urn. What is the probability that both balls are blue?

OpenStudy (anonymous):

for the probability of each separate urn: urn 1: 4/7 urn 2: 5/11 for both urns: 9/18=1/2

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