Mathematics · Probability Distribution
मान लीजिए X एक असतत यादृच्छिक चर (discrete random variable) है जो एक पक्षपाती पासे को फेंकने पर फलक पर दिखाई देने वाली संख्या x को दर्शाता है। X का प्रायिकता वितरण नीचे दिया गया है: X = x | 1 | 2 | 3 | 4 | 5 | 6 P(X = x) | 0.1 | 0.15 | 0.3 | 0.25 | k | k तो X का प्रसरण (variance) है:
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