अंकों (0,1,2,5,7,8) से बिना पुनरावृत्ति (4) अंकों की कितनी संख्याएं बनेंगी?
How many (4)-digit numbers can be formed from (0,1,2,5,7,8) without repetition?
Explanation opens after your attempt
A. (300)
Concept
The thousands place cannot be (0), so \(5\cdot5\cdot4\cdot3=300\). In exams, first choose the non-zero leading digit.
Why this answer is correct
The correct answer is A. (300). The thousands place cannot be (0), so \(5\cdot5\cdot4\cdot3=300\). In exams, first choose the non-zero leading digit.
Exam Tip
हजार के स्थान पर (0) नहीं आएगा, इसलिए \(5\cdot5\cdot4\cdot3=300\)। परीक्षा में पहले non-zero leading digit चुनें।
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