there are 20 tiles in a bag. of these, 9 are purple, 5 are black and the rest are white.
event a = drawing a white tile on the first draw
event b = drawing a black tile on the second draw
if two tiles are drawn from the bag one after the other and not replaced, what is p(b|a) expressed in simplest form?

Efficient homemakers ltd. makes canvas wallets and leather wallets as part of a money-making project. for the canvas wallets, they need two yards of canvas and two yards of leather. for the leather wallets, they need four yards of leather and three yards of canvas. their production unit has purchased 44 yards of leather and 40 yards of canvas. let x be the number of leather wallets and y be the number of canvas wallets. draw the graph showing the feasible region to represent the number of the leather and canvas wallets that can be produced.