अक्षरों (P,Q,R,S,T) में से (2) अक्षर लेकर कितने ordered pairs बनाए जा सकते हैं?

How many ordered pairs can be formed by taking (2) letters from (P,Q,R,S,T)?

Explanation opens after your attempt
Correct Answer

C. (20)

Step 1

Concept

For (2) ordered positions from (5) letters, \({}^{5}P_{2}=20\). In ordered pairs, ((P,Q)) and ((Q,P)) are different.

Step 2

Why this answer is correct

The correct answer is C. (20). For (2) ordered positions from (5) letters, \({}^{5}P_{2}=20\). In ordered pairs, ((P,Q)) and ((Q,P)) are different.

Step 3

Exam Tip

(5) अक्षरों से (2) ordered positions के लिए \({}^{5}P_{2}=20\)। ordered pairs में ((P,Q)) और ((Q,P)) अलग होते हैं।

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Mathematics Answer, Explanation and Revision Hints

अक्षरों (P,Q,R,S,T) में से (2) अक्षर लेकर कितने ordered pairs बनाए जा सकते हैं? / How many ordered pairs can be formed by taking (2) letters from (P,Q,R,S,T)?

Correct Answer: C. (20). Explanation: (5) अक्षरों से (2) ordered positions के लिए \({}^{5}P_{2}=20\)। ordered pairs में ((P,Q)) और ((Q,P)) अलग होते हैं। / For (2) ordered positions from (5) letters, \({}^{5}P_{2}=20\). In ordered pairs, ((P,Q)) and ((Q,P)) are different.

Which concept should I revise for this Mathematics MCQ?

For (2) ordered positions from (5) letters, \({}^{5}P_{2}=20\). In ordered pairs, ((P,Q)) and ((Q,P)) are different.

What exam hint can help solve this Mathematics question?

(5) अक्षरों से (2) ordered positions के लिए \({}^{5}P_{2}=20\)। ordered pairs में ((P,Q)) और ((Q,P)) अलग होते हैं।