Amy has a box containing 6 white, 4 red, and 8 black marbles. She picks a marble randomly. It is red. The second time, she picks a white marble. In the third attempt, Amy picks a white marble again. Amy has not replaced the marbles she picked.

The probability that the fourth marble Amy picks is black is. If Amy picks a black marble in the fourth attempt, the probability that in the fifth attempt she will pick a red or a black marble is.

Question

Brennen Gill

Mathematics

31 May, 11:56

Amy has a box containing 6 white, 4 red, and 8 black marbles. She picks a marble randomly. It is red. The second time, she picks a white marble. In the third attempt, Amy picks a white marble again. Amy has not replaced the marbles she picked.

The probability that the fourth marble Amy picks is black is. If Amy picks a black marble in the fourth attempt, the probability that in the fifth attempt she will pick a red or a black marble is.

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Brice · Answer 1

The probability on the fifth attempt will be 73.3% because the amount of marbles after the first three attempts will be 15. 15/100 is 6.6. If you multiply and make each into a percentage (red will be 20% and black will be 53.3%), then add red and black's probability, then you will get 73.3%