यदि \({}^{n}P_3=10{}^{n}P_2\), तो (n) क्या होगा?

If \({}^{n}P_3=10{}^{n}P_2\), what is (n)?

Explanation opens after your attempt
Correct Answer

C. (12)

Step 1

Concept

({}^{n}P_3=(n-2){}^{n}P_2), so (n-2=10). In exams solve quickly using consecutive permutation relations.

Step 2

Why this answer is correct

The correct answer is C. (12). ({}^{n}P_3=(n-2){}^{n}P_2), so (n-2=10). In exams solve quickly using consecutive permutation relations.

Step 3

Exam Tip

({}^{n}P_3=(n-2){}^{n}P_2), इसलिए (n-2=10)। परीक्षा में consecutive permutation relation से जल्दी solve करें।

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Mathematics Answer, Explanation and Revision Hints

यदि \({}^{n}P_3=10{}^{n}P_2\), तो (n) क्या होगा? / If \({}^{n}P_3=10{}^{n}P_2\), what is (n)?

Correct Answer: C. (12). Explanation: ({}^{n}P_3=(n-2){}^{n}P_2), इसलिए (n-2=10)। परीक्षा में consecutive permutation relation से जल्दी solve करें। / ({}^{n}P_3=(n-2){}^{n}P_2), so (n-2=10). In exams solve quickly using consecutive permutation relations.

Which concept should I revise for this Mathematics MCQ?

({}^{n}P_3=(n-2){}^{n}P_2), so (n-2=10). In exams solve quickly using consecutive permutation relations.

What exam hint can help solve this Mathematics question?

({}^{n}P_3=(n-2){}^{n}P_2), इसलिए (n-2=10)। परीक्षा में consecutive permutation relation से जल्दी solve करें।