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balu736 [363]
3 years ago
13

Forty tickets are sold for a raffle with two prizes. You buy two tickets. What is the probability that you will win both prizes

Mathematics
1 answer:
tekilochka [14]3 years ago
5 0
When you first pick a ticket, there are 2 winning tickets and 40 total tickets.  This means that there is a 2/40 chance of your ticket being a winning one.  This fraction can be reduced to 1/20.

After this, there will be 1 winning ticket left and 39 total tickets.  There is a 1/39 chance of the next ticket being a winning one.  We multiply these two fractions together to get our answer.  1/20 * 1/39 = 1/780, so there is a 1/780 chance of having 2 winning tickets.
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