.0002^10 is the chance you win every ticket.
Your chances of winning a single ticket are 1 minus your chances of losing every ticket
Your chances of LOSING every ticket are .9998^10
So your chances of winning are 1-0.9998^10 = 0.1998% which is very close to 0.2% and should make sense logically with 10 chances at 0.02%
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