O-LevelMathematicsProbability4024/11 · Oct/Nov 2012 · Q123 Marks
A bag contains 1 red and 3 blue balls. Two balls are taken from the bag, at random, without replacement. The tree diagram that represents all the outcomes is shown below. [Figure X.X]
- (a)Write the appropriate probability on each branch.[2]
- (b)Find the probability that the second ball taken is red.[1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Write your answer and get it marked
On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.
Sign up free →