- A35 years
- B40 years
- C45 years
- D30 years
Step-by-Step Solution
a + d = 50. (a - 5) = 3(d - 5) gives a - 3d = -10. Subtracting from a + d = 50: 4d = 60, d = 15, so a = 35.
Answer: A) 35 years
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