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Mathematics 9 Online
OpenStudy (phenix):

There are 25 black cards and 25 red cards in a deck. The black cards are numbered 1, 3, 5,…, 49 and the red cards are numbered 2, 4, 6,…, 50. The cards are thoroughly shuffled and one card is randomly selected. 1)Find the probability of selecting a black card or a card with a multiple of 10 on it. 2)Find the probability of selecting a red card or a card with a multiple of 7 on it. thank you!

OpenStudy (anonymous):

@dan815

OpenStudy (anonymous):

any idea ?

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