यदि p(x) = , प्रायिकता  किसके बराबर होगी:

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SSC CGL JSO Tier-II, 2018 (Statistics) Official Paper-III (Held On: 14 Sept, 2019)
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दिया गया है

P(x) = {x/15 ; x = 1, 2, 3, ----5

           {0 ;        अन्यथा

गणना

प्रायिकता P{1/2 < X < 5/2} जिसका अर्थ है कि, X = 1, 2 ही लागू हैं।

∴P(x = 1) = 1/15

∴ P(x = 2) = 2/15

⇒ P(x ) = p(x = 1) + p(x = 2)

⇒ p(x) = 1/15 + 2/15

∴ p(x) की प्रायिकता 3/15 या 1/5 है।

 

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