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The first and the last terms of an A.P. are 113 and 253. If there are six terms in this sequence, find the sum of sequence. (a) 980 (b) 910 (c) 1098 (d) 920 |
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Answer» Correct option (c) 1098 Explanation: 6 × average of 113 and 253 = 6 × 183 = 1098. |
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