Bag A has 5 white balls and 3 black balls, whereas bag B has 3 white balls and 1 black ball.
(a)[1]
Two balls are chosen at random from bag B without replacement. Find the probability that both balls are black.
(b(i))[2]
Complete the tree diagram shown.
(b(ii))[3]
Find the probability that both balls are the same colour.
(c)[3]
Find the probability that the ball she takes from bag B is black.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “0 ” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI