Ahmed is going to sit a Biology exam and a Chemistry exam.
The probability he will pass the Biology exam is 0.9.
The probability he will pass the Chemistry exam is 0.7.
Complete the probability tree diagram.

Work out the probability that Ahmed will pass both exams.
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.