Four boys, Amos, Ben, Chuck and David, each had
some stickers. The number of stickers Amos has is of the total number
of stickers Ben, Chuck and David have. The number of stickers Ben has
is of
the total number that Amos, Chuck and David have. The number of stickers
that Chuck has is of the total that Amos, Ben and David have.
If David has 400 stickers, find the total number of stickers Amos and
Ben have altogether.
of the total number
of stickers Ben, Chuck and David have. The number of stickers Ben has
is 
of
the total number that Amos, Chuck and David have. The number of stickers
that Chuck has is 
of the total that Amos, Ben and David have.
If David has 400 stickers, find the total number of stickers Amos and
Ben have altogether.