Coupon Accepted Successfully!



As we have seen, the groups or selections made by taking some or all elements out of a number of things is called a combination. In combination, the order in which the things are taken is not important.

The combination of three things, ab and c, taken two at a time are abbc and ca. Here, ab and ba are same because the order in which a and b are taken is not important. What is required is only a combination including a and b. The words “combination” and “selection” can be used without any differentiation.

The number of combinations of n things taking r at a time is denoted by nCr.

Test Your Skills Now!
Take a Quiz now
Reviewer Name