Question
Let be a set of distinct elements. The number of triplets of the elements in which at lest two coordinates is equal to
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Text solutionVerified
Total number of triplets without restriction is .
The number of triplets with all different coordinates is .
Therefore, the required number of triplets is
The number of triplets with all different coordinates is .
Therefore, the required number of triplets is
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Question Text | Let be a set of distinct elements. The number of triplets of the elements in which at lest two coordinates is equal to |
Answer Type | Text solution:1 |
Upvotes | 150 |