(8) अभ्यर्थियों में से (3) का चयन करना है, पर एक विशेष अभ्यर्थी अवश्य चुना जाए। कितने तरीके होंगे?
From (8) candidates, (3) are to be selected, but one particular candidate must be included. How many ways are possible?
Explanation opens after your attempt
B. (21)
Concept
Fix the particular candidate and choose remaining (2) from (7). The number is \(^{7}C_{2}=21\).
Why this answer is correct
The correct answer is B. (21). Fix the particular candidate and choose remaining (2) from (7). The number is \(^{7}C_{2}=21\).
Exam Tip
विशेष अभ्यर्थी को निश्चित मानें और बाकी (2) को (7) में से चुनें। संख्या \(^{7}C_{2}=21\)।
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