Bill gives each of his children 3 apples, so since he has two children this is 3*2=<<3*2=6>>6 apples.
Jill bakes 2 apple pies, using 10 apples each so this means she uses 10*2=<<2*10=20>>20 apples.
In total, this means 20+6=<<20+6=26>>26 apples were used.
Since Bill began with 50 apples, this means there are 50-26=<<50-26=24>>24 apples remaining.
#### 24