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What is the average of the first (4) terms of the geometric progression (15,30,60,120,\ldots)?गुणोत्तर श्रेढ़ी (15,30,60,120,\ldots) के पहले (4) पदों का औसत क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (55)(55)
The sum of the first four terms is (15+30+60+120=225), and the average is (\frac{225}{4}), so none of the given options is correct. In average questions, first find the sum.पहले चार पदों का योग (15+30+60+120=225) है और औसत (\frac{225}{4}) है, इसलिए दिए विकल्पों में कोई सही नहीं है। औसत के प्रश्न में पहले योग निकालें।
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