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How many ways are there to choose the first speaker and second speaker from (12) persons?(12) व्यक्तियों में से प्रथम वक्ता और द्वितीय वक्ता चुनने के तरीके कितने हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (132)(132)
First and second speakers are ordered positions, so ({}^{12}P_{2}=132). Speaking order uses permutation.पहला और दूसरा वक्ता क्रम वाले पद हैं इसलिए ({}^{12}P_{2}=132)। बोलने के क्रम में permutation लगता है।
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