Q: If the ratio of the 11th term of an AP to its 18th term is 2 : 3. Find the ratio of the sum of its first five terms to the sum of its first 10 terms.
A.
1 : 2
B.
5 : 4
C.
6 : 17
D.
17 : 6
Correct Answer:
Option C -
Explanations:
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