SOLUTION: An urn contains 10 numbered balls, of which 6 are red and 4 are blue. A sample of 4 balls is to be selected. How many samples contains 2 red and 2 blue balls.

SOLUTION: An urn contains 10 numbered balls, of which 6 are red and 4 are blue. A sample of 4 balls is to be selected. How many samples contains 2 red and 2 blue balls.

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Question 469740: An urn contains 10 numbered balls, of which 6 are red and 4 are blue. A sample of 4 balls is to be selected. How many samples contains 2 red and 2 blue balls.
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
6C2 * 4C2
=15*6
=90 samples contains 2 red and 2 blue balls.
.
Ed
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