Question
There were some pens in Bag P and Bag Q. After Charlie transferred 13 of the pens from Bag P to Bag Q, the ratio of the number of pens in Bag P to that in Bag Q changed to 1 : 9. Find the ratio of the numbers of pens in Bag P to the number of pens in Bag Q at first.
3 m

Click button first when a symbol is required. X

There were some pens in Bag P and Bag Q. After Charlie transferred 13 of the pens from Bag P to Bag Q, the ratio of the number of pens in Bag P to that in Bag Q changed to 1 : 9. Find the ratio of the numbers of pens in Bag P to the number of pens in Bag Q at first.