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Problem 1. A metal processing firm wishes to install enough automatic -er year but the moulding equipment is part of a production line which will be noulders to produce 2 lakh good parts every year. The firm operates 2000 hours sed only 60 per cent of the time, and its output is about 3 per cent defective. A moulding operation takes 90 seconds per part. Allowing for temperature adjust- ents and maintenance downtime the moulders are about 80 per cent efficient The number of moulders required can be calculated by dividin low many moulders are required