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:

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# Permutations of prime ministers

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