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OpenStudy (anonymous):
There are 10 stations on a railway line. The number of different journey tickets that are required by the authorities is
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OpenStudy (king):
1?
OpenStudy (anonymous):
no, seems to be 90, not sure how
OpenStudy (anonymous):
Yes, it's 90.
OpenStudy (king):
how FFM?
OpenStudy (anonymous):
they have to make 9 different ticktes for each station..9*10=90
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