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The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210
ng = n*g so there are n gs in ng
n + 13 = 21. n = 21 - 13
6/100 X n = 21 .06 X n = 21 n = 21/.06 = 350
n + (2 x 3) = 21 Therefore, n = 21 - (2 x 3) n = 15