Table:
0
A
B
C
D
E
1
S.No
Company
Incorporated
Ministry
Sector
2
1
Air India Air Transport Services Ltd.
2003
Ministry Of Civil Aviation
Services
3
2
Air India Charters
1972
Ministry Of Civil Aviation
Services
4
3
Air India Engineering Services Ltd.
2006
Ministry Of Civil Aviation
Enterprises Under Construction
5
4
Airline Allied Services Ltd.
1983
Ministry of Civil Aviation
Services
6
5
Airports Authority Of India Ltd.
1996
Ministry of Civil Aviation
Services

Questions and formulas:
Question: What is the sector of the company with an incorporated date before 1983?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1<1983),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,C2:C6<1983),5))
Level: medium
Question: What is the average incorporataed year of the Air India Charters company?
Formula: AVERAGEIFS(C1,B1,"air india charters")
Formula2: AVERAGEIFS(C2:C6,B2:B6,"air india charters")
Level: easy