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  • 07-03-2024
  • Mathematics
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If the ratio of the sum of the first n terms of two arithmetic progressions (APs) is given by (7n + 1) : (4n + 27), then find the ratio of their 9th terms.

a) 9 : 6
b) 7 : 4
c) 8 : 5
d) 5 : 8

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