If you buy a lotterie ticket you have a chance to win, if you buy another one, the chance doubles, why is that?

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If you buy a lotterie ticket that has a 1:100000 chances to win you have a 1:1000000 chance. If you buy two tickets, you have 2:1000000 or 1:500000 chance. Why can I eliminate 500.000 tickets with just one more ticket?

What am I conflating here?

Edit: Thank you guys, this was always something I started wondering about.

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4 Answers

Anonymous 0 Comments

You don’t eliminate 500,000 tickets, you eliminate 1 way you *can’t* win.

So instead of having 999,999 ways you can’t win, you now only have 999,998 ways you can’t win. Which means you still double your chances of winning, but the chance you don’t win is still very ~~low~~ high.

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