The answer is 3/5 simplified.
Reasoning:
There are 6 solid white and solid black marbles combined.
There are total of 10 marbles.
Of the 10 marbles, you are 6/10 times likely to pull one of the solid black or white marbles.
Simplify 6/10 by dividing it by a number they both share (2) to get the answer of 3/5.
<span>2+3*(x+3)+x</span>=
2+3x+9+x=
4x+11
10 - 0.33333333... = 9.6666666666...
in a fracion, it is 10 - 1/3 = 9 2/3
