A permutation is merely meaning the arrangement of things in how many ways the elements can be arranged
permutation word comes from a Latin word which means to change thoroughly or exchange the things
If we care about the Order arrangement, then it is a permutation.
Picking a 1st,2nd and 3rd place in the race is an example of permutation .because the order matters
The combination is merely meaning the selection of group
Combination word comes from a Latin word which means joins two by two
If we do not care about the order, so it is called the combination