Level:
Project ID:
9000148905
Accepted:
1
Clonable:
0
Easy:
1
The king has eight daughters. A dragon asks two daughters, otherwise he will
destroy the whole country. In how many ways can we choose a pair of king's
daughters for the dragon?
\(\frac{8!}
{2!\; 6!}=28\)
\(8\cdot 7=56\)
\(8^{2}=64\)
\(8 + 7=15\)