Table:
0
A
B
C
D
E
F
G
H
I
J
1
D 41 √
D 42 √
D 43 √
D 44 √
D 45 √
D 46 √
D 47 √
D 48 √
D 49 √
D 50 O
2
D 20
D 19
D 18
D 17
D 16
D 15
D 14
D 13
D 12
D 11
3
D 21
D 22
D 23
D 24
D 25
D 26
D 27
D 28
D 29
D 30
4
D 40 √
D 39 √
D 38 √
D 37 √
D 36
D 35
D 34
D 33
D 32
D 31
5
D 41 √
D 42 √
D 43 √
D 44 √
D 45 √
D 46 √
D 47 √
D 48 √
D 49 √
D 50 O
6
Majority→
Majority→
Majority→
Majority→
Majority→
Majority→
Majority→
Majority→
Majority→
D 51 O
7
R 41 O
R 42 +
R 43 +
D 57 +
D 56 +
D 55 O
D 54 O
D 53 O
D 52 O
D 51 O
8
R 40 O
R 39 O
R 38 √
R 37 √
R 36 √
R 35 √
R 34 √
R 33 √
R 32 √
R 31 √
9
R 21
R 22
R 23
R 24
R 25
R 26
R 27
R 28
R 29 √
R 30 √
10
R 20
R 19
R 18
R 17
R 16
R 15
R 14
R 13
R 12
R 11
11
R 1
R 2
R 3
R 4
R 5
R 6
R 7
R 8
R 9
R 10

Questions and formulas:
Question: What is the D48 when the D 50 O is d 31?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:J1,J1="d 31"),8))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:J11,J2:J11="d 31"),8))
Level: medium