2010007604 | math4u.vsb.cz

SubArea:

Level:

Project ID:

2010007604

Source Problem:

Accepted:

0

Clonable:

1

Easy:

1

The sum

(\binom{19}{6}) + (\binom{19}{7})

equals to:

(\binom{20}{7})

(\binom{20}{6})

(\binom{19}{8})

(\binom{38}{13})