Find the average of first 100 terms of the series: 1, 3, 6, 10, 15, …. May 24, 2022 by admin โช Choose the correct option.Find the average of first 100 terms of the series: 1, 3, 6, 10, 15, ….A. 1751B. 1731C. 1717D. 1721 Submit Answer