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Updated on: 10 Nov 2023, 08:40
Originally posted by Sajjad1994 on 15 Aug 2021, 21:15.
Last edited by BottomJee on 10 Nov 2023, 08:40, edited 3 times in total.
Last edited by BottomJee on 10 Nov 2023, 08:40, edited 3 times in total.
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Dropdown 1: 781
Dropdown 2: 34
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
39% (03:00) correct
61%
(02:58)
wrong
based on 294
sessions
History
Date
Time
Result
Not Attempted Yet
The chart above shows the frequency distribution of 4- to 8-axle and commercial vehicles at different times during a weekday. All vehicles that did not have 4-8 axles have 2 axles.
Use the drop-down menus to fill in the blanks in each of the following statements based on the information given by the graph.
1. Of the total vehicles going through the tunnel from 7am to 10am, 410 were commercial vehicles with 4-8 axles and 212 were non-commercial vehicles with 2 axles.
2. There was approximately percent more commercial vehicle traffic from midnight to 5am than there was from 5am to 7am.
Attachment:
1.jpg [ 65.44 KiB | Viewed 8008 times ]
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Official Answer
Dropdown 1: 781
Dropdown 2: 34
25 Dec 2021, 07:08
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Quote:
Let C2, C4, N2, N4 be commercial 2 axles, 4-8 axles, non-commercial 2 axles, 4-8 axles respectively
From the question: C4 = 410, N2 = 212
At 7am - 10am: N4 + C4 = 543, C2 + C4 = 436
As C4 is known, N4 and C2 are calculable.
Hence total of C2 + C4 + N2 + N4 = 781 (A)
Quote:
Commercial midnight to 5am = 857
Commercial 5am to 7am = 652
The ratio is \(\frac{857 - 652}{652} = \frac{223}{652}\), almost one-third. Hence C
General Discussion
20 Jun 2025, 23:43
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Let C be commercial and NC be non-commercial vehicles,
1. Of the 781 total vehicles going through the tunnel from 7am to 10am, 410 were commercial vehicles with 4-8 axles and 212 were non-commercial vehicles with 2 axles.
Commercial Vehicles:
Midnight to 5 am => 875
5 am to 7 am => 652
Increase = (875-652)/652 = 34%
2. There was approximately 34 percent more commercial vehicle traffic from midnight to 5am than there was from 5am to 7am.
I got confused with the framing of the second statement, like was it asking for commercial traffic percentage increase or raw number increase, but because it wasn't possible to calculate percentage increase due to missing information, I tried to solve for the increase in the number of commercial vehicles and luckily, it worked.
| 2 Axles | 4-8 Axles | T | |
| C | 26 | 410 | 436 |
| NC | 212 | ||
| T | 238 | 543 | 781 |
1. Of the 781 total vehicles going through the tunnel from 7am to 10am, 410 were commercial vehicles with 4-8 axles and 212 were non-commercial vehicles with 2 axles.
Commercial Vehicles:
Midnight to 5 am => 875
5 am to 7 am => 652
Increase = (875-652)/652 = 34%
2. There was approximately 34 percent more commercial vehicle traffic from midnight to 5am than there was from 5am to 7am.
I got confused with the framing of the second statement, like was it asking for commercial traffic percentage increase or raw number increase, but because it wasn't possible to calculate percentage increase due to missing information, I tried to solve for the increase in the number of commercial vehicles and luckily, it worked.
