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 student chooses one class each from 5 morning, 4 afternoon, and 6 evening classes. With the 2 live morning classes, the 3 recorded evening classes cannot be chosen. How many timetables are possible?

Answer and explanation

Correct answer: 96

Count compatible morning-evening pairs first, then choose an afternoon class. If one of the 2 live morning classes is chosen, none of the 3 recorded evening classes may be selected, so there are 2 × 3 = 6 compatible pairs using the other 3 evening classes. If one of the remaining 3 morning classes is chosen, all 6 evening classes are allowed, giving 3 × 6 = 18 pairs. Thus there are 6 + 18 = 24 compatible morning-evening choices. Each can be combined with any of 4 afternoon classes, so the total is 24 × 4 = 96. Therefore option C is correct; simply multiplying all choices would incorrectly ignore the restriction.

Related tags

Permutations-And-CombinationsFundamental-PrincipleRestricted-ChoicesFundamental Principle Of CountingPermutations 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.