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What is the ratio of preventive maintenance and total maintenance in general manufacturing industry?

(a) 1 : 10 men

(b) 1 : 2.69 men

(c) 1 : 2.37 men

(d) 1 : 3.77 men

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Correct option is (a) 1 : 10 men

Easiest explanation: The ratio of preventive maintenance and total maintenance, in case of primary-metal industry, the ratio is 1 : 2.37 men, in case of machinery manufacturing industry, the ratio is 1 : 2.69 men and in case of general manufacturing industry, the ratio is 1 : 10 men.

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