Machines A, B and C produce 20%, 45% and 35% of a factory's output. The fault rates for A and B are 3% and 5%. The overall fault rate is 4%.
Find the fault rate for machine C.
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Markscheme
2.3 Probability Questions
36 exam-style questions on WJEC A Level Maths 2.3 Probability, covering 2.3.1 Probability and 2.3.2 Probability. Each one has a worked solution and a mark scheme showing where the marks go.