Ning2020

1 Questions
0 Answers

0

1

1

+4

help plz

You are given the $4 \times 4$ grid below. Find the number of ways of placing $8$ counters in the squares (at most one counter per square), so that each row contains exactly two counters, and each column contains exactly two counters.

Ning2020 22.11.2024, 04:57