Nth PS

This topic has expert replies
User avatar
Legendary Member
Posts: 1665
Joined: Thu Nov 03, 2011 7:04 pm
Thanked: 165 times
Followed by:70 members

Nth PS

by karthikpandian19 » Thu Dec 15, 2011 11:40 pm
When ticket sales began, Pat was the
nth customer in line for a ticket, and
customers purchased their tickets at the
rate of x customers per minute. Of the
following, which best approximates the
time, in minutes, that Pat had to wait in
line from the moment ticket sales
began?

(A) (n - 1) x
(B) n + x -1
(C)(n −1)/x
(D)x/(n −1)
(E)n/(x −1)
Source: — Problem Solving |

Senior | Next Rank: 100 Posts
Posts: 49
Joined: Thu Feb 17, 2011 1:36 am
Thanked: 8 times
Followed by:2 members

by ankush123251 » Fri Dec 16, 2011 12:26 am
Tricky one:
For the nth customer waiting time would be the time taken by n-1 customers to purchase their tickets.
Use unity method:
we have answer as (n-1)/x.
PS:Dont know why they did not have n/x as an option to trick the students.