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Question Number 22038 by Tinkutara last updated on 10/Oct/17

$$\mathrm{The}\mathrm{symbols}+,+,\times ,\times ,★,\bullet ,\mathrm{are}$$$$\mathrm{placed}\mathrm{in}\mathrm{the}\mathrm{squares}\mathrm{of}\mathrm{the}\mathrm{adjoining}$$$$\mathrm{figure}.\mathrm{The}\mathrm{number}\mathrm{of}\mathrm{ways}\mathrm{of}\mathrm{placing}$$$$\mathrm{symbols}\mathrm{so}\mathrm{that}\mathrm{no}\mathrm{row}\mathrm{remains}\mathrm{empty}$$$$\mathrm{is}$$

Commented by Tinkutara last updated on 10/Oct/17

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