Table:
0
A
B
C
D
E
F
1
Date of opinion poll
Conductor
Sample size
For
Against
Undecided
2
27 September 2009
Sunday Independent/Quantum Research
1000
68%
17%
15%
3
26 September 2009
Red C/Sunday Business Post
1000
55%
27%
18%
4
25 September 2009
TNS/mrbi/Irish Times
1000
48%
33%
19%
5
18 September 2009
Millward Brown/Lansdowne
1000
53%
26%
21%
6
12 September 2009
Quantum Research/Sunday Independent
1000
63%
15%
22%
7
12 September 2009
Red C/Post
1000
52%
25%
23%
8
4 September 2009
TNS/mrbi
1000
46%
29%
25%
9
28 May 2009
TNS/mrbi
2000
54%
28%
18%
10
13 May 2009
TNS/mrbi
2000
52%
29%
19%
11
25 April 2009
Quantum Research
500
54%
24%
22%
12
28 January 2009
Red C/Post
1001
58%
28%
14%
13
23 January 2009
Lansdowne
1000
58%
29%
12%

Questions and formulas:
Question: When was the poll that showed 54% for and 22% undecided conducted?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(D1="54%")*(F1="22%")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F13,(D2:D13="54%")*(F2:F13="22%")),1))
Level: medium
Question: How many polls taken on different dates show an undecided percentage of 25%?
Formula: ROWS(UNIQUE(FILTER(A1, F1="25%")))
Formula2: ROWS(UNIQUE(FILTER(A2:A13, F2:F13="25%")))
Level: medium
Question: When was Quantum Research's poll conducted?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Quantum Research"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F13,B2:B13="Quantum Research"),1))
Level: medium
Question: Who conducted the poll with sample size of 2000 that shows 18% undecided?
Formula: LET(query1,LET(query1,FILTER(A1:F1,F1="18%"),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=2000))
Formula2: LET(query1,LET(query1,FILTER(A2:F13,F2:F13="18%"),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,3)))),FILTER(query1,CHOOSECOLS(query1,2)=2000))
Level: hard