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Using digits (1,2,3,4,5,6,7,8), how many (3)-digit numbers can be formed whose digits are in increasing order?अंकों (1,2,3,4,5,6,7,8) से (3) अंकों की कितनी संख्याएँ बनेंगी जिनमें अंक बढ़ते क्रम में हों?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (56)(56)
Any (3) chosen digits give exactly one increasing order. When order is predetermined, combinations are enough.कोई भी (3) अंक चुनने पर उनका केवल एक बढ़ता क्रम बनेगा। जब क्रम पहले से निश्चित हो तो संयोजन पर्याप्त है।
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