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A bag contains 2 white marbles, 4 blue marbles, and 5 red marbles. Three marbles are drawn from the bag. What is the probability that not all of them are red?

• math -

First find the prob that ALL of them ARE red, which is
(6/11)(5/10)(4/9) = 2/33

So the prob that not all of them are red
= 1-2/33
=31/33

• math -

There are 5 marbles in a box. One is black, one is yellow, one is red, one is purple and one is orange.

Please answer this

• math -

The answer is 5 marbles in a box. One is black, one is yellow, one is red, one is purple and one is orange.

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It will be 5/5 because it 's only one each

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