The probability of tossing a number cube numbered 1-6 and getting and even number that is greater than or equal to 2

2, 4, 6 --> numbers that are even and greater than 2 on a number cube

1, 3, 5 ---> numbers that are not even and/or not greater than 2 on a number cube

So the probability of getting a even number that is greater than or equal to 2 is 3/6, which reduces to 1/2.

4x 20 is 80 but if ther machine is broken then there is none you have to redo the test