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In how many ways can (11) distinct coins be arranged in a row if one particular coin is at either end?(11) अलग-अलग सिक्कों को पंक्ति में कितने तरीकों से रखा जाए यदि एक विशेष सिक्का किसी भी सिरे पर हो?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (7257600)(7257600)
The particular coin has (2) end choices and the remaining (10) coins are arranged in (10!) ways. The total is (2\cdot10!=7257600).विशेष सिक्के के लिए (2) सिरों के विकल्प हैं और शेष (10) सिक्के (10!) तरीकों से रखे जाएंगे। कुल (2\cdot10!=7257600) है।
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