The probability that a batch of light bulbs will be faulty is 0.04
A factory produces 500 light bulbs.
Work out an estimate for the number of light bulbs that will be faulty.
Practise OCR GCSE Maths Probability with exam-style questions for Foundation and Higher tier. 100 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.