添加随机数会使它们更随机吗？(Does adding random numbers make them more random?)

 这是一个纯粹的理论问题。 
 
 我们都知道，大多数（如果不是全部）随机数生成器实际上只生成伪随机数。 
 
 假设我想要一个10到20的随机数。我可以这样做（ myRandomNumber是一个整型变量）： 
 
myRandomNumber = rand(10, 20);
 
 但是，如果我执行此语句： 
 
myRandomNumber = rand(5, 10) + rand(5, 10);
 
 这种方法更随机吗？ 

This is a purely theoretical question.
 
We all know that most, if not all, random-number generators actually only generate pseudo-random numbers.
 
Let's say I want a random number from 10 to 20. I can do this as follows (myRandomNumber being an integer-type variable):
 
myRandomNumber = rand(10, 20);
 
However, if I execute this statement:
 
myRandomNumber = rand(5, 10) + rand(5, 10);
 
Is this method more random?

原文：https://stackoverflow.com/questions/14741158