Question
Download Solution PDFअंकों 3, 5, 7, 9 पर विचार कीजिए। इन अंकों से 5-अंकीय ऐसी कितनी संख्याएँ बनाई जा सकती हैं, जिनमें इन चारों अंकों में से प्रत्येक अंक हो?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFप्रयुक्त सूत्र:
n! = n × (n - 1) × (n - 2) × ..... × 3 × 2 × 1
5! = 5 × 4 × 3 × 2 × 1 = 120
2! = 2 × 1 = 2
गणना:
चार स्थितियाँ संभव हैं (3, 5, 7, 9, 3), (3, 5, 7, 9, 5), (3, 5, 7, 9, 7), (3, 5, 7, 9, 9)
(3, 5, 7, 9, 3) के लिए
व्यवस्थाओं की संख्या =
⇒
⇒ 60
⇒ 240
Last updated on Jun 18, 2025
->UPSC has extended the UPSC NDA 2 Registration Date till 20th June 2025.
-> A total of 406 vacancies have been announced for NDA 2 Exam 2025.
->The NDA exam date 2025 has been announced. The written examination will be held on 14th September 2025.
-> The selection process for the NDA exam includes a Written Exam and SSB Interview.
-> Candidates who get successful selection under UPSC NDA will get a salary range between Rs. 15,600 to Rs. 39,100.
-> Candidates must go through the NDA previous year question paper. Attempting the NDA mock test is also essential.