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A box contains 20 red marbles and 30 blue marbles. a second box contains 10 white marbles and 40 black marbles. if you choose one marble from each box without looking, what is the probability that you get a blue marble and a black marble?

Respuesta :

musiclover10045

20 +30 = 50 total marbles in 1st box

30 are blue

30/50 reduces to 3/5 probability of choosing a blue marble

10+40 = 50 marbles in 2nd box

40 are black

40/50 reduces to 4/5 probability of choosing a black marble

3/5 * 4/*5 = 12/25 probability of choosing both a blue and black marble

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