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talaangoshtari
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A:S = 4:5 implies the following options:talaangoshtari wrote:Hi,
What is a fast solution for this question?
Amy and Sara has dollars with them in the ratio (4 : 5). If $3 is added to each one of them, the ratio becomes (5 : 6). The difference between money Amy and Sara has is :
A)2
B)3
C)4
D)6
A=4, S=5.
A=8, S=10.
A=12, S=15.
A=16, S=20.
When each value is increased by 3, the resulting ratio must be 5:6:
New A = 4+3 = 7, New S = 5+3 = 8.
New A = 8+3 = 11, New S = 10+3 = 13.
New A = 12+3 = 15, New S = 15+3 = 18.
We can stop here.
The option in red yields the required ratio:
15/18 = 5/6.
Thus:
S-A = 15-12 = 3.
The correct answer is B.
