(9) अंकों में से (2) अंक चुनने हैं ताकि अंकों का क्रम महत्वपूर्ण न हो। कितने तरीके हैं?
From (9) digits, (2) digits are to be chosen and the order is not important. How many ways are there?
Explanation opens after your attempt
B. (36)
Concept
Order is not important, so \(\binom{9}{2}=36\). This is the key idea of combination.
Why this answer is correct
The correct answer is B. (36). Order is not important, so \(\binom{9}{2}=36\). This is the key idea of combination.
Exam Tip
क्रम महत्वपूर्ण नहीं है इसलिए \(\binom{9}{2}=36\) है। यही संयोजन की पहचान है।
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