If M is the mean of the first 100 <strong>EVEN</strong> natural numbers, then what is the mean of the first 100 <strong>ODD</strong> natural numbers?
- A. M-1 ✓
- B. M
- C. M+1
- D. M+2
Correct Answer: A. M-1
Explanation
The mean of the first n even natural numbers is n+1, so M = 101. The mean of the first n odd natural numbers is n, so the odd mean is 100. Therefore, the odd mean is M-1.
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