## catgirl17 find the number of combinations 7C6 one year ago one year ago

1. KingGeorge

$7C6={7! \over 6!(7-6)!}={7 \over 1!}=7$

2. catgirl17

$_{7} C _{6}$

3. KingGeorge

Notice that the $$7!$$ and $$6!$$ cancel for the most part since $$7!=7\cdot6!$$