यदि (n=5) और (r=2) हो तो \({}^{n}P_{r}\) का मान क्या है?

If (n=5) and (r=2), what is the value of \({}^{n}P_{r}\)?

Explanation opens after your attempt
Correct Answer

A. (20)

Step 1

Concept

\({}^{5}P_{2}=5\times4=20\). Start from (n) and take (r) decreasing factors.

Step 2

Why this answer is correct

The correct answer is A. (20). \({}^{5}P_{2}=5\times4=20\). Start from (n) and take (r) decreasing factors.

Step 3

Exam Tip

\({}^{5}P_{2}=5\times4=20\)। (n) से शुरू करके (r) तक घटते गुणनखंड लें।

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Mathematics Answer, Explanation and Revision Hints

यदि (n=5) और (r=2) हो तो \({}^{n}P_{r}\) का मान क्या है? / If (n=5) and (r=2), what is the value of \({}^{n}P_{r}\)?

Correct Answer: A. (20). Explanation: \({}^{5}P_{2}=5\times4=20\)। (n) से शुरू करके (r) तक घटते गुणनखंड लें। / \({}^{5}P_{2}=5\times4=20\). Start from (n) and take (r) decreasing factors.

Which concept should I revise for this Mathematics MCQ?

\({}^{5}P_{2}=5\times4=20\). Start from (n) and take (r) decreasing factors.

What exam hint can help solve this Mathematics question?

\({}^{5}P_{2}=5\times4=20\)। (n) से शुरू करके (r) तक घटते गुणनखंड लें।