यदि (5) अलग अक्षरों में से (2) अक्षरों का क्रमबद्ध चयन हो तो व्युत्पत्ति के अनुसार गुणन क्या होगा?
If (2) letters are selected in order from (5) distinct letters what multiplication follows from the derivation?
Explanation opens after your attempt
B. \(5\times4\)
Concept
There are (5) choices for the first place and (4) for the second. In exams choices decrease when repetition is not allowed.
Why this answer is correct
The correct answer is B. \(5\times4\). There are (5) choices for the first place and (4) for the second. In exams choices decrease when repetition is not allowed.
Exam Tip
पहले स्थान के लिए (5) और दूसरे के लिए (4) विकल्प होंगे। परीक्षा में पुनरावृत्ति न हो तो विकल्प घटते हैं।
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