Stack Exchange
sign up
|
log in
|
chat
|
meta
|
about
|
faq
Mathematics
Questions
Tags
Tour
Users
Ask Question
Badge
Student
Asked first question with score of 1 or more.
Shashank Tomar earned this badge
aug 23 at 6:51
Intuition on the sum of first (n-1) numbers is equal to the number of ways of picking 2 items out of n.
Others with this badge
Mathematics Stack Exchange works best with JavaScript enabled