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Manifesting710
GMAT Focus 1: 615 Q83 V83 DI75 
Posts: 36
Updated on: 12 Mar 2024, 07:57
Originally posted by Manifesting710 on 27 Jan 2024, 07:14.
Last edited by Bunuel on 12 Mar 2024, 07:57, edited 2 times in total.
Last edited by Bunuel on 12 Mar 2024, 07:57, edited 2 times in total.
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In recent years traffic congestion has become increasingly severe at the intersection of two busy roads, Province Highway and Central Highway. This intersection lies between Weston and Eastburg on Province Highway and between South City and Northville on Central Highway. A stoplight at the intersection controls traffic flow. The stoplight's signals operate on a repeated cycle with fixed timing, always directing traffic to flow according to the following order (there are brief gaps in time between each of the following to ensure that traffic has cleared the intersection):
1. First, all and only the traffic traveling straight along Province Highway, from both directions
2. Second, all and only the traffic turning left off of Province Highway, from both directions
3. Third, all and only the traffic traveling straight along Central Highway, from both directions
4. Fourth, all and only the traffic turning left off of Central Highway, from both directions
5. Fifth, all and only the traffic turning right off of either highway, in all directions
Highway planners intend to change the timing of the signals for weekdays so that the length of each signal during the cycle is proportional to the number of vehicles passing through the intersection on a typical weekday morning in the directions controlled by that signal.
1. First, all and only the traffic traveling straight along Province Highway, from both directions
2. Second, all and only the traffic turning left off of Province Highway, from both directions
3. Third, all and only the traffic traveling straight along Central Highway, from both directions
4. Fourth, all and only the traffic turning left off of Central Highway, from both directions
5. Fifth, all and only the traffic turning right off of either highway, in all directions
Highway planners intend to change the timing of the signals for weekdays so that the length of each signal during the cycle is proportional to the number of vehicles passing through the intersection on a typical weekday morning in the directions controlled by that signal.
The number of vehicles passing straight through the intersection on Central Highway on a typical weekday morning: Yes
The current duration in seconds, including gaps, of one full cycle on the stoplight's signals: No
The percent of the vehicles passing through the intersection on a typical weekday morning that turn left off of Province Highway, from both directions: Yes
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
66% (03:06) correct
34%
(03:24)
wrong
based on 751
sessions
History
Date
Time
Result
Not Attempted Yet
For each of the following quantities, select Yes if it can be deduced from the information provided. Otherwise, select No.
| Yes | No | |
| The number of vehicles passing straight through the intersection on Central Highway on a typical weekday morning | ||
| The current duration in seconds, including gaps, of one full cycle on the stoplight's signals | ||
| The percent of the vehicles passing through the intersection on a typical weekday morning that turn left off of Province Highway, from both directions |
ShowHide Answer
Official Answer
The number of vehicles passing straight through the intersection on Central Highway on a typical weekday morning: Yes
The current duration in seconds, including gaps, of one full cycle on the stoplight's signals: No
The percent of the vehicles passing through the intersection on a typical weekday morning that turn left off of Province Highway, from both directions: Yes
1,000: Yes
2,000: Yes
3,000: No
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
63% (01:31) correct
37%
(01:40)
wrong
based on 804
sessions
History
Date
Time
Result
Not Attempted Yet
For each of the following numbers, select Yes if it is the number of vehicles passing through the intersection from one specific direction during the current 40-second signals on a typical weekday morning, according to the information provided.
Otherwise, select No.
Otherwise, select No.
| Yes | No | |
| 1,000 | ||
| 2,000 | ||
| 3,000 |
ShowHide Answer
Official Answer
1,000: Yes
2,000: Yes
3,000: No
\(\frac{11}{46}\)
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
64% (02:09) correct
36%
(02:34)
wrong
based on 610
sessions
History
Date
Time
Result
Not Attempted Yet
Based on the information provided, what fraction of the number of vehicles on typical weekday mornings, passing through the intersection from Weston, passes through the intersection during the current 20-second-long stoplight signals?
| \(\frac{23}{233}\) | |
| \(\frac{5}{23}\) | |
| \(\frac{11}{46}\) | |
| \(\frac{55}{211}\) | |
| \(\frac{25}{72}\) |
ShowHide Answer
Official Answer
\(\frac{11}{46}\)
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27 Jan 2024, 10:47
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(I) Province HW: West to east; Central HW: South to North
Certain rules: P HW straight and then left, followed by P HW straight and then left and finally all right.
(II) Next, stoppage time on signals is given
(III) Finally a chart of traffic flow is given
Let us see the questions.
Can be calculated from (III)
(b) The current duration in seconds, including gaps, of one full cycle on the stoplight's signals
(II) clearly states that the timings do not include the gaps. So, the total time including gaps CANNOT be measured.
(c) The percent of the vehicles passing through the intersection on a typical weekday morning that turn left off of Province Highway, from both directions
We can calculate the total vehicles and also the vehicles that turn left off of P HW from (III)
answer Yes, No, Yes
North to west: 1000
West to South: 2000
South to East: 2000
East to North: 1250
1,000 => Yes
2,000 => Yes
3,000 => No
Now we are concerned with traffic from Weston.
Total vehicles from Weston = 2200(left turn) + 5000(straight) + 2000(Right turn) = 9200
So % that take a left turn = 2200/9200 = 11/46
Certain rules: P HW straight and then left, followed by P HW straight and then left and finally all right.
(II) Next, stoppage time on signals is given
(III) Finally a chart of traffic flow is given
Let us see the questions.
Quote:
1. For each of the following quantities, select Yes if it can be deduced from the information provided. Otherwise, select No.
(a) The number of vehicles passing straight through the intersection on Central Highway on a typical weekday morningCan be calculated from (III)
(b) The current duration in seconds, including gaps, of one full cycle on the stoplight's signals
(II) clearly states that the timings do not include the gaps. So, the total time including gaps CANNOT be measured.
(c) The percent of the vehicles passing through the intersection on a typical weekday morning that turn left off of Province Highway, from both directions
We can calculate the total vehicles and also the vehicles that turn left off of P HW from (III)
answer Yes, No, Yes
Quote:
2. For each of the following numbers, select Yes if it is the number of vehicles passing through the intersection from one specific direction during the current 40-second signals on a typical weekday morning, according to the information provided.
Otherwise, select No.
From, (II) we get the 40 seconds signal is for RIGHT turn from both highways, and from (III) we get the numbers turning right as belowOtherwise, select No.
North to west: 1000
West to South: 2000
South to East: 2000
East to North: 1250
1,000 => Yes
2,000 => Yes
3,000 => No
Quote:
3. Based on the information provided, what fraction of the number of vehicles on typical weekday mornings, passing through the intersection from Weston, passes through the intersection during the current 20-second-long stoplight signals?
From (II), we get 20 seconds signal is for left turn on P HW.Now we are concerned with traffic from Weston.
Total vehicles from Weston = 2200(left turn) + 5000(straight) + 2000(Right turn) = 9200
So % that take a left turn = 2200/9200 = 11/46
Manifesting710
GMAT Focus 1: 615 Q83 V83 DI75
Posts: 36
27 Jan 2024, 07:18
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I had the most trouble deciphering which is the province highway and which central highway 
q1 got it perfect
q2 got 2qs right 1 wrong
q3 wrong
In my opinion, Most of my mistakes were just from not being able to understand what is what
q1 got it perfect
q2 got 2qs right 1 wrong
q3 wrong
In my opinion, Most of my mistakes were just from not being able to understand what is what
