Quote:
Originally Posted by Hollywood376
Your math is correct, the 2% probability doesn't change. His math is (for lack of a better phrase) fucked.
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Ludicrous! If you have a 10% chance of winning a contest every time you play you have a better chance of winning "at least once" if you play 3 times than if you play only once. It is not that your odds are higher in the second or third game. They are the same in the first game as in the second as in the third. If you play multiple times you have a better chance of winning at least once.
NOW, It is not just "98% safe". It is 98% safe PER COUPLE PER YEAR. NOT 98% safe PER COUPLE PER LIFETIME.
IF "in one year two of every 100 couples who use condoms consistently and correctly will experience an unintended pregnancy" THEN how many couples who use condoms consistently and correctly will experience an unintended pregnancy in a 10 year period? MORE than 2%! Of course!