Yanling had 60% more stamps than Lena. Tricia had 75% fewer stamps than Yanling. Yanling and Lena gave Tricia some stamps in the ratio 4 : 1. As a result, Tricia had 2½ times as many stamps as before and Yanling had 300 stamps more than Lena in the end. How many stamps did Lena give to Tricia? [5 marks][Answer given: 150 stamps]
Y L T
--------------------------------------------------
8 : 5 : 2 = 40 : 25 : 10
- 4 : - 1 : + 5 = - 12 : - 3 : + 15
--------------------------------------------------
28 22 25
--------------------------------------------------
6 u --> 300
1 u --> 300/6 = 50
3 u --> 3 x 50 = 150 stamps
It was 150 stamps.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment