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27 Nov 2024, 04:48
Kudos
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2012: 670
2013: 630
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
90% (02:16) correct
10%
(03:32)
wrong
based on 181
sessions
History
Date
Time
Result
Not Attempted Yet
Each year during the third week of June, Unison High School organizes a tree plantation drive where grade 11 students each plant one tree, and grade 12 students plant two trees each. From May 2012 to May 2013, the school had 450 students across grades 11 and 12. On June 1, 2013, all 220 grade 12 students graduated, all grade 11 students advanced to grade 12, and 170 new students joined grade 11. There were no failures or any other changes in the grades.
Select the number of trees planted in June 2012 for 2012 and the number of trees planted in June 2013 for 2013. Make only two selections, one in each column.
Select the number of trees planted in June 2012 for 2012 and the number of trees planted in June 2013 for 2013. Make only two selections, one in each column.
| 2012 | 2013 | |
| 450 | ||
| 570 | ||
| 630 | ||
| 670 | ||
| 680 |
ShowHide Answer
Official Answer
2012: 670
2013: 630
01 Dec 2024, 23:45
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Bunuel
Official Solution:
In June 2012, there were 450 students in total: 230 in grade 11 (450 - 220) and 220 in grade 12. They planted a total of 230 * 1 + 220 * 2 = 670 trees.
In June 2013, the 230 grade 11 students advanced to grade 12, and 170 new students joined grade 11. Together, they planted a total of 170 * 1 + 230 * 2 = 630 trees.
Correct answer:
2012 "670"
2013 "630"
Attachment:
GMAT-Club-Forum-yr6k5hzk.png [ 9.44 KiB | Viewed 601 times ]
General Discussion
27 Nov 2024, 18:41
Kudos
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1. Let's look at the total number of students for each grade:
- New students who joined grade 11 (2013): 170
- Grade 12 students (2012): 220
- Grade 11 students (2012): 450 - 220 = 230
2. For 2012: \(2 * 220 + 230 = 670\) trees were planted. For 2013: \(2 * 230 + 170 = 630\) trees were planted.
3. Our answer will be: 2012 - 670 and 2013 - 630.
- New students who joined grade 11 (2013): 170
- Grade 12 students (2012): 220
- Grade 11 students (2012): 450 - 220 = 230
2. For 2012: \(2 * 220 + 230 = 670\) trees were planted. For 2013: \(2 * 230 + 170 = 630\) trees were planted.
3. Our answer will be: 2012 - 670 and 2013 - 630.
