Hi,

I am having problem calculating the S.E for the total reserve, and I think I am applying the formula wrong. The formula for it should be :

So, for the following triangle:

Would the S.E for the reserve be:

Would it be:

1000+200*(210+220+230)*(2*13/(180))+

2000+210*(220+230)*(2*12/(170+180)+2*13/(180))+

3000+220*(230)*(2*11/(160+170+180)+2*12/(170+180)+2*13/(180))+

4000+230 * 0 * (2*10/(150+160+170+180)+2*11/(160+170+180)+2*12/(170+180)+2*13/(180))