Mathematics · Probability and Statistics
If the discrete random variable X can take all possible integer values from 1 to k, each with a probability 1k, then its variance is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1k2 + 16
- 2k2 + 112
- 3k2 - 16
- 4k2 - 112✓
Correct answer
k2 - 112
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