Question
Quantitative Ability and Data Interpretation Question on Arithmetic and Geometric Progressions
In a decreasing AP, the sum of the terms except 1st term is -75, sum of all the terms except for the last term is 0, the difference between the 9th term and the 13th term is -20. Then find the 1st term?
A
None
B
35
C
25
D
30
Answer
35
Explanation
Solution
The correct option is (B): 35.