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

If A = {1, 2, 3, 4, 5} and B = {0, 1}, how many functions f: A → B have at least two inputs with image 1?

Answer and explanation

Correct answer: 26

Each of the five elements of A can independently be mapped to either 0 or 1, so the total number of functions is 2⁵ = 32. We need at least two inputs mapped to 1. It is easier to subtract the unwanted cases: no input maps to 1, giving exactly 1 function, and exactly one input maps to 1, giving C(5,1) = 5 functions. Thus the required count is 32 − 1 − 5 = 26. Option D counts every function and therefore includes cases with zero or one occurrence of 1. Options A and C do not follow the complementary-count calculation.

Related tags

FunctionsCountingComplementary CountingBinary CodomainFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 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.