In how many ways can we arrange aa...ax_{1}x_{2}...x_{n}bb...b in such a way that a and b are not next to each other? number of (a)=r and number(b)=k?

Muhammad Mansur Zubairu @Muhammad_Zubairu2

01 January 1970 0 8K Report

their are r number of a's and k number of b's

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