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Aptitude | Progressions | Question 4

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Find the Sum of series: 10, 7, 4, 1, -2 (A) 40 (B) 21 (C) 20 (D) 18

Answer: (C)

Explanation: Sum of series = (n/2)[2a+(n-1)d]
= 20

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Last Updated : 28 Jun, 2021
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