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

On (A={1,2,3,4}), how many symmetric relations must contain ((1,2)) and must not contain ((3,4))?

Answer and explanation

Correct answer: (64)

Step 1: For (4) elements, the number of independent symmetric choices is (\frac{4(4+1)}{2}=10). Step 2: The group containing ((1,2)) is forced to be included, and the group containing ((3,4)) is forced to be excluded, so two choices are fixed. Step 3: The remaining (8) choices give (2^8=256).

Related tags

CountingSymmetric RelationRestricted RelationsClass 12Relations And FunctionsMathematicsClass 12 Mcq

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.