(10) अलग-अलग बैजों में से (4) बैजों को क्रम में लगाने के तरीके कितने हैं?
How many ways are there to arrange (4) badges from (10) different badges in order?
Explanation opens after your attempt
C. (5040)
Concept
\({}^{10}P_{4}=10\times9\times8\times7=5040\). For (4) places, take (4) decreasing factors.
Why this answer is correct
The correct answer is C. (5040). \({}^{10}P_{4}=10\times9\times8\times7=5040\). For (4) places, take (4) decreasing factors.
Exam Tip
\({}^{10}P_{4}=10\times9\times8\times7=5040\) है। (4) स्थानों के लिए (4) घटते गुणनखंड लें।
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