The sum of n terms of two arithmetic progressions are in the ratio (2n + 3):(7n + 5). Find the ratio of their 9th terms.

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answerhappygod
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The sum of n terms of two arithmetic progressions are in the ratio (2n + 3):(7n + 5). Find the ratio of their 9th terms.

Post by answerhappygod »

a) 4:5
b) 5:4
c) 9:31
d) 31:9
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