Questions
Let A be a set of n distinct elements. The number of triplets (x, y, z) of the A elements in which at least two coordinates is equal to
detailed solution
Correct option is B
Total number of triplets without restriction is n x n x n. The number of triplets with all different coordinates is nP3. Therefore, the required number of triplets is ,n3−nP3Similar Questions
The total number of 5-digit numbers of different digits in which the digit in the middle is the largest is
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