A museum prepared a complete 15-day schedule for four teams involved

Question

https://gmatclub.com/forum/download/file.php?id=89824 A museum prepared a complete 15-day schedule for four teams involved in setting up a new exhibition: the curation team, design team, installation team, and media team. The chart shows when each task is scheduled and which team is responsible for it. Based on the information in the graph, select from each drop-down menu the option that completes the statement most accurately. To the nearest 5 percent, the number of days during which at least two teams had tasks scheduled is GRAPH_1_PLACEHOLDER percent of the total duration represented by the chart. Day GRAPH_2_PLACEHOLDER was the only day during which all four teams had at least one task scheduled. GMAT-Club-Forum-wxe9nfc1.png

Bunuel · Accepted Answer

https://gmatclub.com/forum/download/file.php?id=89824

A museum prepared a complete 15-day schedule for four teams involved in setting up a new exhibition: the curation team, design team, installation team, and media team. The chart shows when each task is scheduled and which team is responsible for it.

Based on the information in the graph, select from each drop-down menu the option that completes the statement most accurately.

To the nearest 5 percent, the number of days during which at least two teams had tasks scheduled is  GRAPH_1_PLACEHOLDER  percent of the total duration represented by the chart.

Day  GRAPH_2_PLACEHOLDER  was the only day during which all four teams had at least one task scheduled.

Official Solution:

Drop-down 1:

We need to count the days on which  at least two different teams  have tasks scheduled.

From the graph, this occurs on every day from day 3 through day 15, giving 13 days out of the 15-day schedule.

13/15 * 100 ≈ 86.7%

To the nearest 5 percent, this is  85% .

Therefore, the correct selection is  85 .

Drop-down 2:

We are looking for the only day on which  all four teams  have at least one task scheduled.

On day 11:

Curation has Content approval.
Design has Signage design.
Installation has Display fabrication and Case installation.
Media has Interactive setup.

Thus, all four teams have tasks scheduled on day 11, and no other day has all four teams working.

Therefore, the correct selection is  11 .

Correct answer:

Drop-down 1: "85"
Drop-down 2: "11"

madsb18 · Answer

85 and 11.

ThickRiver · Answer

85 percent, and Day 11.

This is Graphics Interpretation, and the only hard part is reading the bar edges. Bars break on the gridlines between the day labels, not on the labels themselves, so Artifact selection running from the left edge to the line just past 3 covers days 1, 2 and 3. Get that half-step wrong and every count after it shifts.

Reading them off:
1. Curation: Artifact selection days 1 to 3, Label drafting 4 to 6, Content approval 10 to 11.
2. Design: Layout planning 3 to 5, Lighting plan 6 to 8, Signage design 11 to 13.
3. Installation: Display fabrication 7 to 11, Case installation 10 to 13, Final placement 13 to 15.
4. Media: Media scripting 5 to 7, Interactive setup 9 to 12, Press preview 14 to 15.

First blank. Count teams, not bars. Days 1 and 2 have only Curation working. Every day from 3 onward has at least two teams on it, so 13 of the 15 days qualify. 13/15 is 86.7 percent, and the nearest 5 percent is 85.

Second blank. Don't test all fifteen days. Curation is the scarcest team, scheduled only on days 1 to 6 and 10 to 11. Design overlaps that on days 3, 4, 5, 6 and 11. Installation doesn't start until day 7, which kills the first four. Day 11 is the only survivor, and it holds up: Content approval, Signage design, Display fabrication, Case installation and Interactive setup. Four teams, five tasks.

That gap between tasks and teams is the trap. Installation runs two tasks at once on day 11 and again on day 13, so counting bars instead of teams inflates both days.

On any Gantt-style chart, find the series with the fewest scheduled days and use it to cut the candidate list before you check anything else.

A museum prepared a complete 15-day schedule for four teams involved

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