Weighted Random Number Generation in C#

Question

Question

How can I randomly generate one of two states, with the probability of 'red' being generated 10% of the time, and 'green' being generated 90% of the time?

Background

Every 2 second either a green or a red light will blink.

This sequence will continue for 5 minutes.

The total number of occurrences of a blinking light should be 300.

Answer 1

Random.NextDouble returns a number between 0 and 1, so the following should work:

if (random.NextDouble() < 0.90)
{
    BlinkGreen();
}
else
{
    BlinkRed();
}