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" EXAMPLE "8" If "^(56)P(r+6):^(54)P(r+3...

" EXAMPLE "8" If "^(56)P_(r+6):^(54)P_(r+3)=30800:1," find "r

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If ""^(56)P_(r+6) : ""^(54)P_(r+3)= 30800, then r is

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If "^56P_(r+6) : "^54P_(r+3) = 30800:1 , then r is equal to