Question 279079: In a shipment of 50 calculaters,4 are defective.One calculater is randomly selected and tested. WHAT IS THE PROBABILITY IT IS NOT DEFECTIVE ?
Answer by oberobic(2304)   (Show Source):
You can put this solution on YOUR website! There are 50 ways you can pick 1 item from a set of 50 items.
We're told that 4 of the 50 are defective, so 4/50 are bad.
So, picking 1 item, you would have a 4/50 or 1/12.5 or an 8% chance of drawing a bad one.
OR
You have a 46/50 chance of picking a good one, or 92%. That means the chance of drawing a bad one is 100% - 92% = 8%.
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Done
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