A train is running between Patna to Howrah.Seven people enter the train somewhere between Patna and Howrah.It is given that nine stops are there between patna and howrah.In how many ways can the tickets be purchased if no restriction is there with respect to the number of tickets at any station?(2 people donot buy the same ticket)  Choose the correct choice from the following
A) 45c7 ways
B) 45c6 ways
C) 44c7 ways
D) 46c7 ways
E) 45c8 ways
P _ _ _ _ _ _ _ _ _ H   P 1 2 3 4 5 6 7 8 9 H   If those people enter in the 1st station, the no. of ways they can buy tickets: 9 ways   If those people enter in the 2nd station, the no. of ways they can buy tickets: 8 ways   .   .   If those people enter in the 9th station, the no. of ways they can buy tickets: 1 way   Now total no. of ways to buy tickets are:   9+8+7+6+5+4+3+2+1= 
<gadget id="calculator">  9+8+7+6+5+4+3+2+1</gadget>
<output>45</output>
45   So, the tickets can be purchased by 7 people is 45c7 ways   45c7 waysNSWER:45c7 ways
<result>A</result>
A train is running between Patna to Howrah.Seven people enter the train somewhere between Patna and Howrah.It is given that nine stops are there between patna and howrah.In how many ways can the tickets be purchased if no restriction is there with respect to the number of tickets at any station?(2 people donot buy the same ticket)