There are 10 stations on a railway line. The number of different journey tickets that are required by the authorities is :	Options:
A) 90 B) 92 C) 91 D) None of these E) Cannot be determined
Explanation :   From a certain station, there will be a ticket for each of the other 9 stations.   Since, there are 10 stations on the railway line, the number of different journey tickets will be 10×9 i.e 90.   90nswer : 90
<result>A</result>
There are 10 stations on a railway line. The number of different journey tickets that are required by the authorities is :