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The ChildCare Center (CCC) is a medium-sized child care facility that offers daytime supervision and instruction on weekdays (Monday through Friday) for children up to the age of 5. There are many children who attend CCC every weekday, and a relatively small number attend fewer than 3 days per week.
The classroom assignment and daily fee paid to CCC for each child are determined by the child's age on Friday of the previous week.
The classroom assignment and daily fee paid to CCC for each child are determined by the child's age on Friday of the previous week.
Twos: Same/few staff
Threes: Same/few staff
FourFives: More staff
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:
67% (03:50) correct
33%
(03:50)
wrong
based on 2714
sessions
History
Date
Time
Result
Not Attempted Yet
ID: 100476
From the Saturday before Week 2 through the Friday of Week 2, exactly eight of the children in attendance at CCC had birthdays. Two children turned 1, one child turned 2, one child turned 3, and four children turned 4. All changes to classroom attendance from Week 2 to Week 3 were due to these birthdays.
For each of the following classrooms, select More staff if more classroom staff members were assigned to that classroom on the Monday of Week 3 than on the Monday of Week 2. Otherwise, select Same/fewer staff.
From the Saturday before Week 2 through the Friday of Week 2, exactly eight of the children in attendance at CCC had birthdays. Two children turned 1, one child turned 2, one child turned 3, and four children turned 4. All changes to classroom attendance from Week 2 to Week 3 were due to these birthdays.
For each of the following classrooms, select More staff if more classroom staff members were assigned to that classroom on the Monday of Week 3 than on the Monday of Week 2. Otherwise, select Same/fewer staff.
| More staff | Same/few staff | |
| Twos | ||
| Threes | ||
| FourFives |
ShowHide Answer
Official Answer
Twos: Same/few staff
Threes: Same/few staff
FourFives: More staff
Thursday
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:
48% (01:47) correct
52%
(01:36)
wrong
based on 3256
sessions
History
Date
Time
Result
Not Attempted Yet
ID: 100475
In the Ones classroom in Week 2, for which one of the following days was the ratio of classroom staff to children least?
In the Ones classroom in Week 2, for which one of the following days was the ratio of classroom staff to children least?
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday |
ShowHide Answer
Official Answer
Thursday
Infant, Ones: Decrease
Ones, Twos: Increase/no change
Threes, FourFives: Decrease
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:
50% (02:27) correct
50%
(02:23)
wrong
based on 3056
sessions
History
Date
Time
Result
Not Attempted Yet
ID: 100477
Suppose that, in an effort to reduce staffing costs for the Friday of Week 2, the director of CCC had considered combining some classes for that day. For each of the following combinations, select Decrease if combining those classes would have decreased the number of classroom staff needed, provided that no other changes had occurred. Otherwise, select Increase/no change.
Suppose that, in an effort to reduce staffing costs for the Friday of Week 2, the director of CCC had considered combining some classes for that day. For each of the following combinations, select Decrease if combining those classes would have decreased the number of classroom staff needed, provided that no other changes had occurred. Otherwise, select Increase/no change.
| Decrease | Increase/no change | |
| Infant, Ones | ||
| Ones, Twos | ||
| Threes, FourFives |
ShowHide Answer
Official Answer
Infant, Ones: Decrease
Ones, Twos: Increase/no change
Threes, FourFives: Decrease
A: Apply
According to the information on the Week 2 Enrollment tab, on Monday of Week 2 there were 9 children in the Twos classroom. During Week 2, as of Friday one child had turned 2 and another child had turned 3. The CCC tab indicates that a child's classroom assignment is determined by her or his age on Friday of the previous week, so the number of children in the Twos classroom was the same on Monday of Week 3 (9 + 1 – 1 = 9) as it was on Monday of Week 2. The Regulations tab indicates that CCC assigns the minimum number of staff necessary to comply with regulations, so the number of staff assigned to that classroom would have been the same on Monday of Week 3 as it was on Monday of Week 2.
The correct answer is Same/fewer staff.
B: Apply
On Monday of Week 2 there were 15 children in the Threes classroom. During Week 2, as of Friday one child had turned 3 and four children had turned 4. Given that a child's classroom assignment is determined by her or his age on Friday of the previous week, on Monday of Week 3, there were 12 children (15 + 1 – 4 = 12) in the Threes classroom. Furthermore, given that the required ratio of staff to children in the Threes classroom is 1:10, and that CCC assigns the minimum number of staff needed to comply with regulations, we can calculate the number of staff assigned to the Threes classroom for each Monday by dividing the number of children in the Threes classroom by 10 and rounding up to the nearest whole number.
Monday of Week 2: 15/10=1.5
15/10=1.5, for 2 staff.
Monday of Week 3: 12/10=1.2
12/10=1.2, for 2 staff.
Therefore, the same number of staff was assigned to the Threes classroom for Monday of Week 2 and for Monday of Week 3.
The correct answer is Same/fewer staff.
C: Apply
On Monday of Week 2 there were 12 children in the FourFives classroom. During Week 2, as of Friday four children had turned 4 and no children turned 5 or 6. Given that a child's classroom assignment is determined by her or his age on Friday of the previous week, on Monday of Week 3 the FourFives classroom had 16 children (12 + 4 = 16). Furthermore, given that the required ratio of staff to children in the FourFives classroom is 1:13, and that CCC assigns the minimum number of staff needed to comply with regulations, we can calculate the number of staff assigned to the FourFives classroom for each Monday by dividing the number of children in the FourFives classroom by 13 and rounding up to the nearest whole number.
Monday of Week 2: 12/13≈0.92
12/13≈0.92, for 1 staff.
Monday of Week 3: 16/13≈1.23
16/13≈1.23, for 2 staff.
Therefore, more staff were assigned to the FourFives classroom for Monday of Week 3 than were assigned to that classroom for Monday of Week 2.
The correct answer is More staff.
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Question 3:
Suppose that, in an effort to reduce staffing costs for the Friday of Week 2, the director of CCC had considered combining some classes for that day. For each of the following combinations, select Decrease if combining those classes would have decreased the number of classroom staff needed, provided that no other changes had occurred. Otherwise, select Increase/no change.
We are asked to determine whether combining certain classrooms on Friday of Week 2 would reduce the number of staff required. To start, we calculate how many staff are needed when the classes remain separate.
Now we are moving to evaluate the combined groups.
19 children, youngest under 2, ratio 1/4, so 5 staff. Separately they required 6. This means a decrease.
16 children, youngest age 1, ratio 1/4, so 4 staff. Separately they required 4. This means no change.
20 children, youngest age 3, ratio 1/10, so 2 staff. Separately they required 3. This means a decrease.
GMAT-Club-Forum-esmufmff.png [ 12.6 KiB | Viewed 12061 times ]
Suppose that, in an effort to reduce staffing costs for the Friday of Week 2, the director of CCC had considered combining some classes for that day. For each of the following combinations, select Decrease if combining those classes would have decreased the number of classroom staff needed, provided that no other changes had occurred. Otherwise, select Increase/no change.
We are asked to determine whether combining certain classrooms on Friday of Week 2 would reduce the number of staff required. To start, we calculate how many staff are needed when the classes remain separate.
- Infant: 9 children, youngest less than 2, ratio 1/4, so 3 staff
- Ones: 10 children, youngest less than 2, ratio 1/4, so 3 staff
- Twos: 6 children, youngest 2, ratio 1/6, so 1 staff
- Threes: 12 children, youngest 3, ratio 1/10, so 2 staff
- FourFives: 8 children, youngest 4, ratio 1/13, so 1 staff
Now we are moving to evaluate the combined groups.
- Infant and Ones:
19 children, youngest under 2, ratio 1/4, so 5 staff. Separately they required 6. This means a decrease.
- Ones and Twos:
16 children, youngest age 1, ratio 1/4, so 4 staff. Separately they required 4. This means no change.
- Threes and FourFives:
20 children, youngest age 3, ratio 1/10, so 2 staff. Separately they required 3. This means a decrease.
Attachment:
GMAT-Club-Forum-esmufmff.png [ 12.6 KiB | Viewed 12061 times ]
Question 2:
In the Ones classroom in Week 2, for which one of the following days was the ratio of classroom staff to children least?
The Ones classroom follows the rule of 1 staff member for every 4 children.
Monday 13 children need 4 staff. Three staff cover 12 children (3*4=12), and one more staff is required for the remaining child.
Ratio = 4:13 ≈ 0.31
Tuesday 13 children again need 4 staff.
Ratio = 4:13 ≈ 0.31
Wednesday 11 children need 3 staff. Two staff cover 8 children (2*4=8), so one more is needed for the remaining 3.
Ratio = 3:11 ≈ 0.27
Thursday 12 children need 3 staff. Three staff cover exactly 12 children (3*4=12).
Ratio = 3:12 = 0.25
Friday 10 children need 3 staff. Two staff cover 8 children, leaving 2 more children, which requires one extra staff.
Ratio = 3:10 = 0.30
The least staff-to-child ratio was on Thursday.
GMAT-Club-Forum-272tvd06.png [ 9.59 KiB | Viewed 8966 times ]
In the Ones classroom in Week 2, for which one of the following days was the ratio of classroom staff to children least?
The Ones classroom follows the rule of 1 staff member for every 4 children.
Monday 13 children need 4 staff. Three staff cover 12 children (3*4=12), and one more staff is required for the remaining child.
Ratio = 4:13 ≈ 0.31
Tuesday 13 children again need 4 staff.
Ratio = 4:13 ≈ 0.31
Wednesday 11 children need 3 staff. Two staff cover 8 children (2*4=8), so one more is needed for the remaining 3.
Ratio = 3:11 ≈ 0.27
Thursday 12 children need 3 staff. Three staff cover exactly 12 children (3*4=12).
Ratio = 3:12 = 0.25
Friday 10 children need 3 staff. Two staff cover 8 children, leaving 2 more children, which requires one extra staff.
Ratio = 3:10 = 0.30
The least staff-to-child ratio was on Thursday.
Attachment:
GMAT-Club-Forum-272tvd06.png [ 9.59 KiB | Viewed 8966 times ]
