Math
posted by Samantha .
In the town of Niceville, a local lottery is held once a year for the residents. Lottery tickets cost 50 cents apiece. Each lottery ticket contains four numbers, from 1 to 20. The lottery machine will select six numbers from 1 to 20. A winning ticket, worth $100, will contain four of the six numbers chosen by the machine.
a)How much money would a person need to spend to buy every possible combination of four numbers?
b)What is the probability, to the nearest tenthousandth, that a person will select four correct numbers?
c)To the nearest tenthousadnth, what is the probability that a ticket has NO correct numbers?
Can you please explain how you got the answer also? Thanks so much~
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