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From (14) students, (6) are to be selected. At least (1) of (3) named students must be selected. How many selections are possible?(14) विद्यार्थियों में से (6) चुनने हैं। (3) नामित विद्यार्थियों में से कम से कम (1) चुना जाए। कितने चयन होंगे?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (2541)(2541)
Total selections are (^{14}C_{6}). Subtract selections with no named student (^{11}C_{6}) to get (2541).कुल चयन (^{14}C_{6}) हैं। कोई नामित विद्यार्थी न चुने जाने वाले (^{11}C_{6}) घटाने पर (2541) मिलता है।
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