Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

How many symmetric relations can be formed on A={1,2,3}?

Answer and explanation

Correct answer: 2⁶

For a set with n elements, a symmetric relation is determined by independent choices for all n diagonal pairs and for one member of each off-diagonal reverse pair. The number of such independent choices is n+n(n−1)/2=n(n+1)/2. Each chosen position may be included or omitted, giving 2^[n(n+1)/2] symmetric relations. With n=3, the exponent is 3(4)/2=6, so the answer is 2⁶. Option B counts all possible relations, not only symmetric ones.

Related tags

Counting Symmetric RelationsRelations And FunctionsCombinatorics

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.