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A cell phone company produces 40 defective phones out of every 5000 phones. Another cell phone company produces 30 defective phones out of every 6000 phones. What is the highest number of defective phones do the companies have in common?

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Answer:

10

Step-by-step explanation:

Given that:

Company A:

40 defective out of every 5000

Company B :

30 out of every 6000

To obtain the highest number of defective phones both companies can produce in common :

Factors of :

40 : 2, 4, 5, 8, 10, 20, 40

30 : 2, 3, 5, 6, 10, 15, 30

Hence, highest number of defective phones both companies can produce in common is 10

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