श्न2- सभी प्रश्न हल करो।
क-x--12x-64 को हल करो।
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57+64+ 43 + 67+ 49+59+ 61+59+44+ 47. हल माध्य (x) = 10. 10 -55. (x -X). प्रसरण (०१) = 2- +9+12 +122 +62 +4+ 62 +42 ...
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