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

What is the value of \(\frac{9!+8!}{7!}\)?

Answer and explanation

Correct answer: 80

Using \(9!=9\times 8!\), the numerator becomes \(9\times 8!+8!=8!(9+1)=10\times 8!\). Therefore, \(\frac{10\times 8!}{7!}=10\times 8=80\), since \(8!=8\times 7!\). Hence, 80 is correct. The value 72 results from dividing only \(9!\) by \(7!\) and incorrectly omitting the \(8!\) term. Exam tip: factor out the common factorial before simplifying.

Related tags

Factorial NotationPermutations And CombinationsClass 11 MathematicsFactorial SimplificationMathematicsClass 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.