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

A group of 4 is to be chosen from 10 players, but the captain and vice-captain cannot both be included. How many groups are possible?

Answer and explanation

Correct answer: 182

This is a combinations problem because only the membership of the group matters; the order in which players are chosen is irrelevant. Without the restriction, the number of groups is C(10,4) = 10!/(4!6!) = 210. To count the invalid groups, include both the captain and the vice-captain first. Then the remaining 2 members must be selected from the other 8 players, giving C(8,2) = 28 invalid groups. Therefore, valid groups = 210 - 28 = 182. Hence option C is correct. Options A, B, and D do not result from correctly subtracting the groups containing both restricted players.

Related tags

CombinationsRestrictionCommitteePermutations And CombinationsMathematicsClass 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.