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[" 5."2m" white identical coins and "2n"...

[" 5."2m" white identical coins and "2n" red identical coins are arranged in a straight line with "(m+n)" ider "],[" coins on each side of a central mark.The number of ways of arranging the identical coins,so the "],[" arrangements are symmetrical with respect to the central mark."],[[" (A) "m*C_(m)," (B) "mm_(n)," (C) "mm_((m-m))," (D) "mm_(mm)]]

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