Counting 4口·￥①，4三，t更，里)Q0 Jun Ma (majunainju.edu.cn) 2-3 Counting March 9.2022 5/35Counting Sums P Binomials ￾n k
Jun Ma (majun@nju.edu.cn) 2-3 Counting March 9, 2022 5 / 35