9000136901

SubArea: 
Combinatorics
Level: 
B
Project ID: 
9000136901
Source Problem: 
2010007604
Accepted: 
1
Clonable: 
1
Easy: 
1
The sum \(\left({15\above 0.0pt 8} \right) +\left ({15\above 0.0pt 9} \right)\) equals to:
\(\left({16\above 0.0pt 9} \right)\)
\(\left({15\above 0.0pt 10}\right)\)
\(\left({15\above 0.0pt 7} \right)\)
\(\left({16\above 0.0pt 8} \right)\)
\(\left({30\above 0.0pt 17}\right)\)