Table:
0
A
B
C
D
E
F
1
Rank by average
Place
Couple
Total points
Number of dances
Average
2
1
2
Gilles & Cheryl
449
16
28.1
3
2
1
Shawn & Mark
431
16
26.9
4
3
3
Melissa & Tony
430
16
26.9
5
4
5
Lil' Kim & Derek
284
11
25.3
6
5
6
Chuck & Julianne
209
9
23.3
7
6
4
Ty & Chelsie
289
13
22.2
8
7
9
David & Kym
104
5
20.8
9
8
7
Lawrence & Edyta
138
7
19.7
10
9
12
Denise & Maksim
55
3
18.3
11
10
13
Belinda & Jonathan
35
2
17.5
12
11
11
Holly & Dmitry
69
4
17.2
13
12
8
Steve-O & Lacey
95
6
15.8

Questions and formulas:
Question: How many couples have an average of 25.3?
Formula: ROWS(UNIQUE(FILTER(C1, F1=25.3)))
Formula2: ROWS(UNIQUE(FILTER(C2:C13, F2:F13=25.3)))
Level: medium
Question: How many different numbers of total dances are there for the couple ranked at number 6?
Formula: SUM(FILTER(E1, B1=6))
Formula2: SUM(FILTER(E2:E13, B2:B13=6))
Level: easy
Question: What couple has an average of 17.2?
Formula: LET(query1,SUMMARIZE(C1,SUMX(F1)),FILTER(query1,CHOOSECOLS(query1,2)=17.2))
Formula2: LET(query1,SUMMARIZE(C2:C13,SUMX(F2:F13)),FILTER(query1,CHOOSECOLS(query1,2)=17.2))
Level: hard
Question: What's the minimal number of dances a couple has danced?
Formula: SUM(E1)
Formula2: SUM(E2:E13)
Level: easy
Question: What's the highest number a couple has ranked at?
Formula: SUM(B1)
Formula2: SUM(B2:B13)
Level: easy