JEE Math Practice Question
If the 10th term of an A.P. is $${1 \over {20}}$$ and its 20th term is $${1 \over {10}}$$, then the sum of its first 200 terms is
- A.100
- B.$$100{1 \over 2}$$
- C.$$50{1 \over 4}$$
- D.50
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