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1. |
In a factory there are three types of machine M1, M2 and M3 which produces 25%, 35% and 40% of the total products respectively.M1, M2 andM3 produces 2%, 4% and 5% defective products, respectively. what is the percentage of non-defective products ? |
A. | 9% |
B. | 7.1% |
C. | 6.1% |
D. | 6.1% |
E. | one of these |
Answer» D. 6.1% | |