(6) अलग-अलग अध्यायों को पढ़ने का क्रम बनाना है। यदि पहला अध्याय निश्चित है, तो कितने क्रम होंगे?
An order of studying (6) distinct chapters is to be made. If the first chapter is fixed, how many orders are possible?
Explanation opens after your attempt
A. (120)
Concept
The first chapter is fixed, so the remaining (5) chapters can be ordered in (5!) ways. The answer is (120).
Why this answer is correct
The correct answer is A. (120). The first chapter is fixed, so the remaining (5) chapters can be ordered in (5!) ways. The answer is (120).
Exam Tip
पहला अध्याय निश्चित है, इसलिए शेष (5) अध्याय (5!) क्रमों में आ सकते हैं। उत्तर (120) है।
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