Question
There were some grey, brown and black pens in a box. 19 of the pens were brown. The ratio of the number of grey pens to the number of black pens was 3 : 5. There were 336 fewer brown pens than black pens.
  1. Find the ratio of the number of grey pens to the number of brown pens to the number of black pens in the box.
  2. How many black pens were there?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

There were some grey, brown and black pens in a box. 19 of the pens were brown. The ratio of the number of grey pens to the number of black pens was 3 : 5. There were 336 fewer brown pens than black pens.
  1. Find the ratio of the number of grey pens to the number of brown pens to the number of black pens in the box.
  2. How many black pens were there?