Table:
0
A
B
C
D
E
1
Year of census
total
Croats
Serbs
Others
2
2001
31,670
18,199 (57.46%)
10,412 (32.88%)
3,059 (9.66%)
3
1991
84,024
36,910 (43.93%)
31,910 (37.98%)
15,204 (18.09%)
4
1981
81,203
30,157 (37.14%)
25,146 (30.97%)
25,903 (31.89%)
5
1971
76,602
34,629 (45.21%)
28,470 (37.17%)
13,593 (17.09%)
6
1961
54,707
24,527 (44.83%)
22,774 (41.63%)
7,406 (13.54%)

Questions and formulas:
Question: What is the average total of the census after 1971 with 10,412 (32.88%) Serbs?
Formula: AVERAGE(FILTER(B1, (A1>1971)*(D1="10,412 (32.88%)")))
Formula2: AVERAGE(FILTER(B2:B6, (A2:A6>1971)*(D2:D6="10,412 (32.88%)")))
Level: easy