In a large bag of marbles 40% of them are red the child chooses 4 marbles from the bag. If the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles

Question

Mathematics

Silvester

16 August, 02:43

In a large bag of marbles 40% of them are red the child chooses 4 marbles from the bag. If the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles

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Beatrice Zhang · Answer 1

The chance of getting exactly 3 red marbles is 6.4%.

The chance of getting a red marble is 40%. To find the chance of getting 3 reds in a row, we have to multiply 40% by itself 3 times.

0.4 x 0.4 x 0.4 = 0.064 or 6.4%