If a 3 digit lottery game has a 1 in 1000 chance of winning, the probability of winning a 6 digit game just like it must be very high. What is the probability of winning this lottery game if only one ticket is purchased?
Express your answers as a ratio in simplest form using a colon to separate the numbers. example 3:4.

  Some games have a predetermined winners printed on tickets.The new state lottery game promises a winner in 4 out of every 20 tickets. If the probability is true, what would be the least number of tickets a person should buy to guarantee getting a winning ticket.

Rhonda bought 40 tickets, 10 of which were winners. If Rhonda's win:lose ratio holds true for all tickets, what is the probability of a randomly drawn ticket being a winning ticket?

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