A game has to be made from marbles of three colors, RED, GREEN and YELLOW where three marbles has to be kept one upon another. In how many ways these marbles can be arranged? Select one a. 9 b. 4 c. 6
Added by Anthony J.
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We have three options for the first marble, two options for the second marble (since we can't choose the same color as the first marble), and one option for the third marble (since we can't choose the same color as the first two marbles). Therefore, there are 3 x Show more…
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