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Answer :
Final answer:
The 28th term of the given arithmetic progression (AP) is 31. Therefore, the correct answer is option a) 31.
Explanation:
The 28th term of the given arithmetic progression (AP) is 31.
- Calculate the common difference by subtracting the sum of the first 7 terms from the sum of the next 7 terms: 161 - 63 = 98.
- Divide the common difference by 7 to find the value of each common difference which is 98/7 = 14.
- The 28th term is found by adding 14 to the last term in the 14th term: 17 + 14 = 31.
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