Table:
0
A
B
C
D
E
F
1
Date
Airline
Aircraft type
Registration
People on board
Fatalities
2
1965-05-05
Iberia
Lockheed L-1049G
EC-AIN
49
30
3
1965-12-07
Spantax
Douglas DC-3
EC-ARZ
32
32
4
1970-01-05
Iberia
Fokker F-27 Friendship 600
EC-BOD
49
0
5
1972-12-03
Spantax
Convair CV-990
EC-BZR
155
155
6
1980-04-25
Dan-Air
Boeing 727-46
G-BDAN
146
146

Questions and formulas:
Question: How many fatalities shows for the lockheed l-1049g?
Formula: SUM(FILTER(F1,C1="lockheed l-1049g"))
Formula2: SUM(FILTER(F2:F6,C2:C6="lockheed l-1049g"))
Level: easy
Question: What is the number of people on board at Iberia Airline, with the aircraft type of lockheed l-1049g?
Formula: AVERAGE(FILTER(E1,(B1="iberia")*(C1="lockheed l-1049g")))
Formula2: AVERAGE(FILTER(E2:E6,(B2:B6="iberia")*(C2:C6="lockheed l-1049g")))
Level: easy
Question: How many fatalities are there for the airline of spantax, with a registration of ec-arz?
Formula: AVERAGE(FILTER(F1,(B1="spantax")*(D1="ec-arz")))
Formula2: AVERAGE(FILTER(F2:F6,(B2:B6="spantax")*(D2:D6="ec-arz")))
Level: easy