Question
There were some red, green and yellow pens in a box. 213 of the pens were green. The ratio of the number of red pens to the number of yellow pens was 4 : 7. There were 350 fewer green pens than yellow pens.
  1. Find the ratio of the number of red pens to the number of green pens to the number of yellow pens in the box.
  2. How many yellow 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 red, green and yellow pens in a box. 213 of the pens were green. The ratio of the number of red pens to the number of yellow pens was 4 : 7. There were 350 fewer green pens than yellow pens.
  1. Find the ratio of the number of red pens to the number of green pens to the number of yellow pens in the box.
  2. How many yellow pens were there?