Min and Shiyun have $202. Kimberly and Min have $242. The ratio of Shiyun to Kimberly is 1 : 3. How much does Min have?
Amount that Shiyun has = 1 u
Amount that Kimberly has = 3 u
The amount that Min has is the repeated identity.
Min + 1 u = 202 --- (1)
Min + 3 u = 242 --- (2)
(2) - (1)
3 u - 1 u = 242 - 202
2 u = 40
1 u = 40 ÷ 2 = 20
From (1):
Min + 1 u = 202
Min + 1 x 20 = 202
Min + 20 = 202
Amount that Min has
= 202 - 20
= $182
Answer(s): $182
