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The average of the first (8) terms of an arithmetic progression is (27). What is the sum of these (8) terms?

Answer and explanation

Correct answer: (216)

The direct answer is option B, 216. Average means total sum divided by the number of terms: \(\text{average}=S/n\). Rearranging gives \(S=\text{average}\times n\). The average is 27 and there are 8 terms, so \(S_8=27\times8=216\). Option A, 206, is 10 too small. Option B, 216, is correct because it follows the definition of average exactly. Option C, 226, is also too large and has no valid calculation behind it. Option D, 236, is still larger and incorrect. No common difference or individual terms are needed here. The common mistake is to divide 27 by 8; instead, when the average and number of items are known, multiply them to obtain the sum.

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