There are 4 red counters and x x\,x blue counters in a bag.
2 counters are removed from the bag at random.
The probability that both the counters taken are blue is 13\displaystyle \frac{1}{3}31
Work out the value of xxx.
Practise Edexcel IGCSE Maths Probability Equation Questions with exam-style questions for IGCSE Maths. 7 questions, matched to the Edexcel IGCSE Maths (4MA1) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.