(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
Correct Answer

A. (15)

Step 1

Concept

One color is fixed and one is removed so choose the remaining (2) colors from (6). The ways are \(\binom{6}{2}=15\).

Step 2

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 \(\binom{6}{2}=15\).

Step 3

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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Mathematics Answer, Explanation and Revision Hints

(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?

Correct Answer: A. (15). Explanation: एक रंग तय है और एक हट गया है इसलिए बाकी (2) रंग (6) में से चुनेंगे। तरीके \(\binom{6}{2}=15\) हैं। / One color is fixed and one is removed so choose the remaining (2) colors from (6). The ways are \(\binom{6}{2}=15\).

Which concept should I revise for this Mathematics MCQ?

One color is fixed and one is removed so choose the remaining (2) colors from (6). The ways are \(\binom{6}{2}=15\).

What exam hint can help solve this Mathematics question?

एक रंग तय है और एक हट गया है इसलिए बाकी (2) रंग (6) में से चुनेंगे। तरीके \(\binom{6}{2}=15\) हैं।