1/5 and 1/6 of something unknown

Question

In a box of chocolates

-   one-fifth are plain chocolates

-   one-sixth are white chocolates

-   the other 38 are milk chocolates.

How many chocolates are there in the box?

Answer 1

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.