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Mike@Magoosh
- GMAT Instructor
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A bag contains ten marbles of the same size: 3 are identical green marbles, 2 are identical red marbles, and the other 5 are five distinct colors. If 5 marbles are selected at random, how many distinct combinations of five marbles could be drawn?
(A) 41
(B) 51
(C) 62
(D) 72
(E) 82
Counting & combination problems on the GMAT are tricky because many of them don't fit into nice neat formulas. They require some efficient out-of-the-box thinking, as this problem does. For a set of challenging counting problems, as well as for the OA & OE of this particular problem, see:
https://magoosh.com/gmat/2015/counting- ... -the-gmat/
Mike
(A) 41
(B) 51
(C) 62
(D) 72
(E) 82
Counting & combination problems on the GMAT are tricky because many of them don't fit into nice neat formulas. They require some efficient out-of-the-box thinking, as this problem does. For a set of challenging counting problems, as well as for the OA & OE of this particular problem, see:
https://magoosh.com/gmat/2015/counting- ... -the-gmat/
Mike
Magoosh GMAT Instructor
https://gmat.magoosh.com/
https://gmat.magoosh.com/
