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Q.

Number of ways in which 8 letters of word KATAPPAA can be placed in squares of the figure so that no row remains empty is $λ$ , then $\frac{λ}{12264}$ is:

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answer is 10.

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Detailed Solution

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Total – (Row 1 is empty) – (Row 2 is empty) – (Row 3 is empty) $= (^{11} C_{8} -^{9} C_{8} -^{8} C_{8} -^{9} C_{8}) \cdot \frac{8!}{4! 2!}$

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