1+2+3+.......+50= 1275. എങ്കിൽ 3+6+9+.....+150 =A3825B3725C3925D3875Answer: A. 3825 Read Explanation: • 1+2+3+.........+50 = 1275 3(1+2+3+......+50) = 3 x 1275 = 3825Read more in App