There are some green beads and some yellow beads in a bag.
The ratio of green beads to yellow beads is 3:13:13:1.
Two beads are removed at random without replacement.
The probability that both beads taken are green is 1120\displaystyle \frac{11}{20}2011.
Work out how many yellow beads are in the bag.
Practise Edexcel GCSE Maths Probability Equation Questions with exam-style questions for Foundation and Higher tier. 28 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 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.
