(12) लोगों में से (5) चुनने हैं। (3) विशेष लोगों में से ठीक (1) चुना जाना चाहिए। कितने चयन होंगे?
From (12) people, (5) are to be chosen. Exactly (1) of (3) special people must be selected. How many selections are possible?
Explanation opens after your attempt
B. (378)
Concept
Choose (1) special person and the remaining (4) people from the other (9). The number is \(^{3}C_{1}\times{}^{9}C_{4}=378\).
Why this answer is correct
The correct answer is B. (378). Choose (1) special person and the remaining (4) people from the other (9). The number is \(^{3}C_{1}\times{}^{9}C_{4}=378\).
Exam Tip
विशेष लोगों में से (1) और बाकी (4) लोगों को शेष (9) में से चुनें। संख्या \(^{3}C_{1}\times{}^{9}C_{4}=378\)।
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