Mathematics · Permutations and Combinations
7 अलग-अलग चित्रों को एक दीवार पर लगे 5 कीलों पर कितने तरीकों से लटकाया जा सकता है, यह मानते हुए कि प्रत्येक कील पर अधिकतम एक ही चित्र आ सकता है?
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