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If the last term of a finite progression is l, the sum of all its terms is n by 2 times:
Aa minus l
Ba times l
Ca over l
Da plus l
Answer & Solution
Correct answer: D. a plus l
1. Pair the first term with the last.
2. Every such pair has the same total.
3. The sum uses a plus l.
_Source: NCERT Class 10 Mathematics, Chapter 5, Arithmetic Progressions._
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