(8) रंगों में से (3) रंग चुनने हैं लेकिन एक निश्चित रंग अवश्य हो और दूसरा निश्चित रंग न हो। कितने तरीके हैं?
From (8) colors (3) colors are to be selected with one fixed color included and another fixed color excluded. How many ways are there?
Explanation opens after your attempt
A. (15)
Concept
One color is fixed and one is removed so choose the remaining (2) colors from (6). The ways are \(\binom{6}{2}=15\).
Why this answer is correct
The correct answer is A. (15). One color is fixed and one is removed so choose the remaining (2) colors from (6). The ways are \(\binom{6}{2}=15\).
Exam Tip
एक रंग तय है और एक हट गया है इसलिए बाकी (2) रंग (6) में से चुनेंगे। तरीके \(\binom{6}{2}=15\) हैं।
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