allery1 + 3 + 5 + 7 is a finite series. Its sum is:
A15
B12
C20
D16
Answer & Solution
Correct answer: D. 16
1. Add the four odd numbers.
2. 1 plus 3 is 4, plus 5 is 9, plus 7 is 16.
3. The sum is 16.
_Source: syllabus Mathematics, Chapter 8, Sequences and Series._
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