Expert Math Class 12 Level 1

What is the number of symmetric relations on a set of 4 elements?

4 तत्वों वाले set पर symmetric relations की संख्या क्या होगी?

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Correct Answer

B. 1024

Explanation

Step 1: Identify the concept: symmetric relation. Step 2: In a symmetric relation, off-diagonal pairs are selected in pairs and diagonal pairs are free. The exponent is n(n+1)/2=10, so the answer is 1024. Step 3: Exam tip: Remember that (a,b) comes with (b,a).

Step 1: अवधारणा symmetric relation है। Step 2: Symmetric relation में off-diagonal pairs pairwise चुने जाते हैं और diagonal free रहता है। Exponent n(n+1)/2=10, इसलिए उत्तर 1024 है। Step 3: याद रखें: (a,b) के साथ (b,a) को भी लेना पड़ता है।

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