Given the set of n numbers, n > 1, of which one is 1− 1/n, and all the others are 1. The arithmetic mean of the n numbers is
Explanation:
Sum of numbers = 1-1n + 1 + 1 + 1 + ... (n - 1) times
= 1-1n + n - 1
= n - 1/n
∴ Arithmetic mean of numbers = n-1nn
= n2-1n2
Hence, option (d).
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