Which expression is undefined ?

Why do interests rates on loans to be lower in a weak economy than in a strong one

Use long division to indentify (12xto the second power+15x-8)divided by 3x

Fracisco's game involves 3 green, 2 yellow, 4 red, and 3 black marbles. if he randomly draws three marbles from the bag, without replacement, what is the probability that he will draw yellow, and then red, and then black? a)1/192 b)1/72 c)3/220 d)1/55