1 - 1/5 - 1/6 = the fraction of milk chocolates
30/30 - 6/30 - 5/30 = 19/30
So there are 38 milk chocolates and the fraction of milk chocolates is 19/30.
19/30 of what number is 38?
"of" means *
"what number" means x
"is" means =
19/30 * x = 38
x = 38 * 30/19
x = 60
Answer: There are 60 chocolates in the box.