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Ezra
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Did only one-quarter of the urban elite own at least one slave in the early eighteenth century?
In many countries people did not own slaves at all.
A sample of 4 iPods is selected from a shipment of 20 iPods there are 5 defective iPods in the shipment what is the probablity that the sample does not contain any defective iPods?
i dont get it? --- The probability that the first iPod you select is not defective is 16/20. If you selected a non-defective iPod the first time, there are now 15 non-defective iPods out of 19 remaining. So, the odds that the second you selected is non-defective is 15/19. By similar reasoning, the probability that the third is non-defective (given that the first two weren't defective) is 14/18, and for the fourth iPod, it is 13/17. So the probability that none of the four iPods you selected are defective is: (16/20)*(15/19)*(14/18)*(13/17)=364/969, or approximately 37.6%
About how many people own a computer?
Well over 1 Billion and it's expected to be 2 Billion by 2014
What is the ratio of people with IPhones?
I have read that 400,000,000 people own I phones. So out of 7 billion people in the world, about 6% own them.
How many people own a gun?
The most recent study, from '94, showed 25% of adults in the U.S. own guns. That's about 54,450 million citizens! Numbers for the whole world are impossible.
