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

There are n distinct points on a board. Joining every pair of points forms a total of 45 line segments. What is the value of n?

Answer and explanation

Correct answer: 10

Each pair of points determines one line segment, so the total is n(n − 1)/2. Setting n(n − 1)/2 = 45 gives n² − n − 90 = 0, or (n − 10)(n + 9) = 0. The roots are 10 and −9; since a number of points cannot be negative, n = 10.

Related tags

Quadratic EquationsWord ProblemsNumber Of Line SegmentsWord Problems And ApplicationsMathematicsClass 10 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.