Min and Marion have $128. Jane and Min have $148. The ratio of Marion to Jane is 1 : 2. How much does Min have?
Amount that Marion has = 1 u
Amount that Jane has = 2 u
The amount that Min has is the repeated identity.
Min + 1 u = 128 --- (1)
Min + 2 u = 148 --- (2)
(2) - (1)
2 u - 1 u = 148 - 128
1 u = 20
From (1):
Min + 1 u = 128
Min + 1 x 20 = 128
Min + 20 = 128
Amount that Min has
= 128 - 20
= $108
Answer(s): $108
