The ceremonial commander-in-chief of armed forces of the country is:
5 countries president and prime minister went for summit. If all 5 prime minister shake hand to president at random, in how many ways they can shake hand if none of the same country PM shake hand to that country president.
5 countries president and prime minister went for the summit. If all 5 prime minister shakes hand to a president at random, in how many ways they can shake hand if none of the same country PM shakes hand to that country president.