In Box A, there are 5 white marbles and 3 black marbles.
In Box B, there are 4 white marbles and 7 black marbles.
Tom chooses one marble at random from Box A and then chooses one marble at random from Box B.
Work out the probability that Tom chooses two white marbles.
Practise OCR GCSE Maths Probability Trees with exam-style questions for Foundation and Higher tier. 40 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.