Question

A bag contains 4 red marbles, 3 green ones, 2 white marbles, and 2 pink marbles....

A bag contains 4 red marbles, 3 green ones, 2 white marbles, and 2 pink marbles. HINT [See Example 7.] You randomly grab 8 marbles. What is the probability that this set will contain all the red marbles?

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Answer #1

total number of marbles=11

8 marbles can be selected from 11 marbles in   ways.

There are 4 red marbles.

If the set contains all the red marbles that implies the other 4 marbles are selected from the other 7 marbles. This can be done in ways 4 red marbles can be selected from 4 red marbles in    way.

So the required probability=  

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