The prime ministers A, B, C, D, E, F and G of 7 countries will address at a summer meeting.(adsbygoogle = window.adsbygoogle || []).push({});

a) Find the number of arrangerments that can be made so that

1)A will speak before C,

2)A will speak before C and C will speak before E.

b)In how many of those ways in a2) will C speak immediately after A?

I stump in this question.

Thanks :rofl:

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Permutations of prime ministers

**Physics Forums | Science Articles, Homework Help, Discussion**