Wb Jee
Permutations And Combinations
WB JEE 2024
MCQ+1 / -0.252024
1, 2, 3, ...., m সংখ্যাগুলিকে যথেচ্ছ ভাবে সাজানো হলে যেগুলিতে 1, 2, ......., r (r < m) সামিপ্যে থাকবে তার সংখ্যা হল
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