You correctly wrote the following equations:
x/y = 3/2
(x + 40)/y = 5/3
Use the second stmt, which is equivalent to:
x/y + 40/y = 5/3. Since x/y = 3/2, substitute that and you get that
40/y = 5/3 - 3/2 = 1/6. This means that 40/y = 1/6 or that y = 40 * 6 = 240. Then you should use x/y = 3/2 to find x.
x will ultimately be 3/2*240 = 360.
C unless I've made some calculation errors (which I've been doing a lot lately, unfortunately). What is the OA?
ratio
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Source: Beat The GMAT — Problem Solving |
DanaJ wrote:You correctly wrote the following equations:
x/y = 3/2
(x + 40)/y = 5/3
Use the second stmt, which is equivalent to:
x/y + 40/y = 5/3. Since x/y = 3/2, substitute that and you get that
40/y = 5/3 - 3/2 = 1/6. This means that 40/y = 1/6 or that y = 40 * 6 = 240. Then you should use x/y = 3/2 to find x.
x will ultimately be 3/2*240 = 360.
C unless I've made some calculation errors (which I've been doing a lot lately, unfortunately). What is the OA?
Sorry, i don't have the OA, I panic and quit the test.
But thanks a lot for helping me solving the problem, it make more sense.
The question asking for jan bill, so it should be y which is 240( i guess), it didn't ask for feb bill.
thanks
