The origin in a graph.<span />
Add like terms
-4x+x=-3x
6-2=4
So the simplified term is 4-3x
So there is 15 different outcomes which we want 6 of them 2, 3, 5, 7, 11 all prime numbers so a 6/15 chance we’d pull a prime number
6/15 or 40% chance we’d pull a prime number out of the bag