If the discriminant of a quadratic equation, given by B^2-4AC is positive, it has 2 real solutions. If 0, it has 1 real solution and if negative it has 0 real solutions.
The answer to your question is b
4/9*3/9= 12/81=4/27
You have a 4 in 27 chance of drawing a red then a blue.
60=4/5x
4/5=0.8
60/0.8=75
X=75
