πππ
π °οΈπ ±οΈβοΈπ ±οΈπ °οΈ
πβπβ πβπ
πβ‘οΈπ½β‘οΈπ
πβ‘οΈπβ‘οΈπβ‘οΈπ
πβ‘οΈπΈβ‘οΈπ
A+B+Cβ‘οΈπͺπ
#permutation #k-permutation #nPk #combinatorics #formula #selection and arrangement #order matters #sequence count