SOLUTION: A light bulb manufacturer randomly checks light bulbs. Of 1,000 light bulbs, 30 light bulbs are defective. How many light bulbs will most likely be defective in a batch of 3,500?

Question 252320: A light bulb manufacturer randomly checks light bulbs. Of 1,000 light bulbs, 30 light bulbs are defective. How many light bulbs will most likely be defective in a batch of 3,500?
Found 2 solutions by stanbon, drk:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A light bulb manufacturer randomly checks light bulbs. Of 1,000 light bulbs, 30 light bulbs are defective. How many light bulbs will most likely be defective in a batch of 3,500?
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Proportion:
x/3500 = 30/1000
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x/3500 = 3/100
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x/35 = 3/1
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x = 105
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Cheers,
Stan H.
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
This is a proportion problem.
1000 / 30 = 3500 / X. Cross multiply to get 1000x = 105000. Divide to get X = 105.
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