(8) व्यक्तियों को (8) अलग कार्य दिए जाते हैं। यदि ठीक (1) व्यक्ति को अपना सही कार्य मिले, तो कितने वितरण संभव हैं?
(8) people are assigned (8) distinct jobs. If exactly (1) person gets the correct job, how many assignments are possible?
Explanation opens after your attempt
A. (14832)
Concept
Choose the correctly assigned person in (8) ways, and derange the remaining (7) people with \(D_7=1854\). Exactly one correct means all others are wrong.
Why this answer is correct
The correct answer is A. (14832). Choose the correctly assigned person in (8) ways, and derange the remaining (7) people with \(D_7=1854\). Exactly one correct means all others are wrong.
Exam Tip
सही कार्य पाने वाले को (8) तरीकों से चुनें और बाकी (7) का पूर्ण विस्थापन \(D_7=1854\) है। ठीक एक सही का मतलब बाकी सभी गलत होंगे।
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