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From (5) teachers and (6) students, a group of (4) persons is to be formed with at least (1) teacher and at least (2) students. How many groups are possible?(5) अध्यापक और (6) विद्यार्थियों में से (4) व्यक्तियों का दल बनाना है जिसमें कम से कम (1) अध्यापक और कम से कम (2) विद्यार्थी हों। कुल कितने दल बनेंगे?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (275)(275)
The valid cases are (1) teacher (3) students and (2) teachers (2) students. Form cases satisfying both at least conditions.संभव मामले (1) अध्यापक (3) विद्यार्थी और (2) अध्यापक (2) विद्यार्थी हैं। दोनों कम से कम शर्तों को साथ मिलाकर मामले बनाएँ।
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