(a) State clearly what is meant by two events being statistically independent. (2
marks)
(b) In a certain factory which employs 500 men, 2% of all employees have a minor
accident in a given year. Of these 30% had safety instructions whereas 80% of
all employees has no safety instructions.
Required:
Find the probability of an employee being accident-free given that he had:
(i) no safety instructions. (5 marks)
(ii) safety instructions. (5 marks)