अंकों (0,1,2,3,4,5,6,7,8,9) से बिना पुनरावृत्ति कितनी (6)-अंकीय संख्याएं बनेंगी जिनके अंक सख्ती से बढ़ते क्रम में हों?
How many (6)-digit numbers can be formed from digits (0,1,2,3,4,5,6,7,8,9) without repetition if the digits are in strictly increasing order?
Explanation opens after your attempt
Correct Answer
A. (84)
Concept
In increasing order, each chosen set gives only one arrangement, and including (0) would not give a (6)-digit number. So choose (6) digits from (1) to (9).
Why this answer is correct
The correct answer is A. (84). In increasing order, each chosen set gives only one arrangement, and including (0) would not give a (6)-digit number. So choose (6) digits from (1) to (9).
Exam Tip
बढ़ते क्रम में हर चुने हुए समूह की केवल एक व्यवस्था होती है, और (0) शामिल होने पर संख्या (6)-अंकीय नहीं रहेगी। इसलिए (1) से (9) में से (6) अंक चुनें।
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