9000148909
Level:
A
There are \(24\)
girls and \(8\)
boys in the class. How many ways are there to designate a president and vice-president
of the class if it is required that one of the position will be held by a boy and the
other one by a girl?
\(24\cdot 8\cdot 2=384\)
\(24\cdot 8=192\)
\(\frac{32!}
{2!\; 30!}=496\)
\(\frac{32!}
{24!\; 8!}=10\:518\:300\)
