How to perform dilution factors

If you have 2.00 mol hcl acid, how do you make a 1:20, 1:30 and 1:200 dilutes in a 250 ml volumetric flask

take 250/20 = 12.5 ml of HCl and 250-12.5 ml H2O

take 250/30 of HCl and 250 - 250/30 ml of water

take 250/200 ml of HCl & 250-250/200 of water