A package contains 10 different souvenirs about Beijing, 10 different souvenirs about Shanghai, 10 different souvenirs...
A package contains 10 different souvenirs about Beijing, 10 different souvenirs about Shanghai, 10 different souvenirs about Xi’an, 10 different souvenirs about Seoul and 10 different souvenirs about New York. Suppose that 10 souvenirs are randomly selected from the package.
(1) What is the probability that the selection contains no souvenirs about Seoul?
(2) What is the probability that the selection contains no souvenirs about Beijing, Shanghai or Xi’an?
(3) What is the probability that the selection misses souvenirs about at least one place?
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