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April 23, 2014

April 23, 2014

Posted by **Anonymous** on Sunday, December 1, 2013 at 8:35pm.

If a person buys one LOTTO ticket, what is his probability of winning the grand price?

- Math Probability -
**Joe**, Sunday, December 1, 2013 at 8:53pm20 x 20 x 20 x 20 x 20 x 20

You have 20 chances for each number and that happens for each draw...

you have 1 chance out of _________

Can you finish from here?

- Math Probability -
**Reiny**, Sunday, December 1, 2013 at 9:02pmJoe has assumed that the same number could be drawn more than once.

However,in most of these lotteries, some kind of drawing method is used, such as 20 different-numbered pingpong balls, and the order that they are drawn does not matter.

Number of ways to draw 6 numbers from 20

is C(20,6) = 38760

so prob(winner) = 1/38760

- Math Probability -
**Anonymous**, Sunday, December 1, 2013 at 9:09pmThank You, Joe and Reiny for your help. I believe Reiny you use combination formula and I believe you are right, because the question does states that the order doesn't matter. Once again thanks to you both

- Math Probability -
**Tina**, Sunday, December 1, 2013 at 10:24pmI decided to add my name. This is my first time on here and I wanted to see what its all about...

another question I'm struggling with

If a person buys 1000 LOTTO tickets, what is his probability of winning the grand prize?

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