There are 15 socks in a drawer. 7 of the socks are black, 5 of the socks are navy, and 3 of the socks are grey. James takes two socks at random from the drawer.
Work out the probability that both of the socks James takes are the same colour.
You must show your working.
Practise Eduqas GCSE Maths Conditional Probability with exam-style questions for Foundation and Higher tier. 28 questions, matched to the Eduqas GCSE Maths (C300QS) specification and written in Component 1 and Component 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.