An urn contains 5 red marbles, 4 black marbles, and 3 white marbles. Then the number of ways in which 4 marbles can be drawn so that at most three of them are red is:
Option: 1 490
Option: 2 680
Option: 3 300
Option: 4 400
Number of red balls selected can be 0 or 1 or 2 or 3
So, the following cases are possible
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