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[" 2.यदि "^(9)P(r)=3024" तो "r" का मान क...

[" 2.यदि "^(9)P_(r)=3024" तो "r" का मान क्या होगा ? "],[[" (a) "2," (b) "3," (c) "4," (d) "5]]

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