Originally Posted by

**Vedicmaths** I am sorry for an incomplete problem.

But this is really amazing, you actually used the correct mean = 100 and standard deviation = 5.

And thank you very much for your help. I solved the problem. I was getting confused on how to get the standard deviation value here and the last problem of 100.

Quick question though: so like in the last problem we are asked to find for 100 and since you said this is a a continuous random variable, that will be zero.

So is it always going to be zero, whenever we are asked to find the 100% of the total? What if we are asked to find for 50, will that be the same procedure we used above?

Thanks again for your help Sir!