(4) तत्वों वाले समुच्चय से (5) तत्वों वाले समुच्चय में कितने फलन ऐसे होंगे जो एकैकी नहीं हैं?

How many functions from a (4)-element set to a (5)-element set are not one-one?

Explanation opens after your attempt
Correct Answer

B. (505)

Step 1

Concept

There are \(5^4\) total functions and \(^{5}P_4\) one-one functions. Subtract one-one functions to get not one-one functions.

Step 2

Why this answer is correct

The correct answer is B. (505). There are \(5^4\) total functions and \(^{5}P_4\) one-one functions. Subtract one-one functions to get not one-one functions.

Step 3

Exam Tip

कुल फलन \(5^4\) हैं और एकैकी फलन \(^{5}P_4\) हैं। जो एकैकी नहीं हैं, उन्हें घटाकर पाएँ।

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Mathematics Answer, Explanation and Revision Hints

(4) तत्वों वाले समुच्चय से (5) तत्वों वाले समुच्चय में कितने फलन ऐसे होंगे जो एकैकी नहीं हैं? / How many functions from a (4)-element set to a (5)-element set are not one-one?

Correct Answer: B. (505). Explanation: कुल फलन \(5^4\) हैं और एकैकी फलन \(^{5}P_4\) हैं। जो एकैकी नहीं हैं, उन्हें घटाकर पाएँ। / There are \(5^4\) total functions and \(^{5}P_4\) one-one functions. Subtract one-one functions to get not one-one functions.

Which concept should I revise for this Mathematics MCQ?

There are \(5^4\) total functions and \(^{5}P_4\) one-one functions. Subtract one-one functions to get not one-one functions.

What exam hint can help solve this Mathematics question?

कुल फलन \(5^4\) हैं और एकैकी फलन \(^{5}P_4\) हैं। जो एकैकी नहीं हैं, उन्हें घटाकर पाएँ।