A light bulb manufacturer randomly tests 1500 bulbs and finds that 2 are defective.
How many defective bulbs would be expected in a shipment of 24,000 bulbs?
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Ok, let's see how to do it. They say that every 2 bulbs are defective in 1500 bulbs. So the ratio of bulbs which are defective = 2/1500.
Now, to find out number of bulbs which are defective in 24000 bulbs we simply multiply the ratio.
So, Total number of defective bulbs = 2/1500 * 24000 = ?