You purchase 20 lottery tickets for which the probability of winning some prize on a single ticket is 1 in 10. What is the probability that you have at least 1 winning ticket among the 20 tickets?
Added by Carlos C.
Step 1
This is simply 1 - (1/10) = 9/10. Now, we find the probability of not winning any prize on all 20 tickets. This is (9/10)^20. Show more…
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