(10) विद्यार्थियों में से मॉनिटर और सह-मॉनिटर चुनने के तरीके कितने हैं?

How many ways are there to choose a monitor and assistant monitor from (10) students?

Explanation opens after your attempt
Correct Answer

A. (90)

Step 1

Concept

There are two distinct posts, so \({}^{10}P_{2}=10\times9=90\). Order matters for different designations.

Step 2

Why this answer is correct

The correct answer is A. (90). There are two distinct posts, so \({}^{10}P_{2}=10\times9=90\). Order matters for different designations.

Step 3

Exam Tip

दो अलग पद हैं इसलिए \({}^{10}P_{2}=10\times9=90\)। अलग designation में order महत्त्वपूर्ण होता है।

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(10) विद्यार्थियों में से मॉनिटर और सह-मॉनिटर चुनने के तरीके कितने हैं? / How many ways are there to choose a monitor and assistant monitor from (10) students?

Correct Answer: A. (90). Explanation: दो अलग पद हैं इसलिए \({}^{10}P_{2}=10\times9=90\)। अलग designation में order महत्त्वपूर्ण होता है। / There are two distinct posts, so \({}^{10}P_{2}=10\times9=90\). Order matters for different designations.

Which concept should I revise for this Mathematics MCQ?

There are two distinct posts, so \({}^{10}P_{2}=10\times9=90\). Order matters for different designations.

What exam hint can help solve this Mathematics question?

दो अलग पद हैं इसलिए \({}^{10}P_{2}=10\times9=90\)। अलग designation में order महत्त्वपूर्ण होता है।