Table:
0
A
B
C
D
E
1
Brand
Year founded
Year began making autos
Year joined GM
Markets served today
2
Baojun
2010
2010
2010
China
3
Buick
1899
1903
1908
North America, China, Israel
4
Cadillac
1902
1902
1909
North America, Europe, Asia, Middle East
5
Chevrolet
1911
1911
1917
Global, except Australia, New Zealand
6
GMC
1901
1901
1909
North America, Middle East
7
Holden
1856
1908
1931
Australia, New Zealand
8
Jiefang
2011
2011
2011
China
9
Opel
1862
1899
1929
Africa, Asia, Europe, South America
10
Wuling
2002
2002
2002
China
11
Vauxhall
1857
1903
1925
United Kingdom

Questions and formulas:
Question: What is the average year to begin making autos for a brand that joined GM in 1917?
Formula: AVERAGE(FILTER(C1, D1=1917))
Formula2: AVERAGE(FILTER(C2:C11, D2:D11=1917))
Level: easy