How to generate random double number outside a specified range in Java?

Is there a way to generate random double value outside a specified range?

I know there is one within the range:

Random r = new Random();
double randomValue = rangeMin + (rangeMax - rangeMin) * r.nextDouble();

I would require one that is outside the range e.g

the range is 20 - 50 and I would like a number below 20 or higher than 50.

Could someone please advise?