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3 years ago

9

ou select a marble without looking and then put it back. If you do this 21 times, what is the best prediction possible for the n

umber of times you will pick a marble that is not orange? There are 7 marbles in total, 2 orange marbles and 5 blue marbles

1 answer:

wolverine [178]3 years ago

4 0

5/7 = non orange marbles
?/21 = chances to pick a non blue
21/7 = 3
5x 3 =15
15/21

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