simple probablility of a prop bet...

[Cap_Of_Water]

but i'm not sure if i figured it out correctly. Someone help me out pllzzz....

Side bet in a holdem game between player A and player B. Player A wins if a King, Queen, or Jack hits the flop (any three cards, just picked these randomly). Player B wins if there is no K, Q, or J on the flop. Who has the edge and what is the edge?