अंकों (1,3,5,7,9) से बिना पुनरावृत्ति कितनी (1)-अंकीय संख्याएँ बनेंगी?
How many (1)-digit numbers can be formed from digits (1,3,5,7,9) without repetition?
Explanation opens after your attempt
Correct Answer
D. (5)
Concept
There are (5) choices for one place, so the answer is (5). For a one-place arrangement, available choices are the answer.
Why this answer is correct
The correct answer is D. (5). There are (5) choices for one place, so the answer is (5). For a one-place arrangement, available choices are the answer.
Exam Tip
एक स्थान के लिए (5) विकल्प हैं इसलिए उत्तर (5) है। (1)-स्थान वाली व्यवस्था में उपलब्ध विकल्प ही उत्तर होते हैं।
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