Table:
0
A
B
C
D
E
1
Name
Birth year and age
Net worth US$ (billions)
Citizenship
Source
2
Liliane Bettencourt
1922/1923(age 90–91)
30.0
France
L'Oréal , inherited
3
Christy Walton
1948/1949(age 64–65)
28.8
United States
Wal-Mart , inherited
4
Alice Walton
1949/1950(age 63–64)
26.3
United States
Wal-Mart , inherited
5
Iris Fontbona & family
1942/1943(age 70–71)
17.4
Chile
Antofagasta PLC , inherited
6
Jacqueline Mars
1940/1941(age 72–73)
17.8
United States
Mars, Incorporated , inherited
7
Gina Rinehart
1953/1954(age 59–60)
17
Australia
Hancock , inherited
8
Susanne Klatten
1962/1963(age 50–51)
14.3
Germany
Altana , inherited
9
Abigail Johnson
1961/1962(age 51–52)
12.7
United States
Fidelity Investments , inherited
10
Miuccia Prada
1948/1949(age 64–65)
12.4
Italy
Prada , inherited
11
Anne Cox Chambers
1919/1920(age 93–94)
12
United States
Cox Enterprises , inherited

Questions and formulas:
Question: What's the source of wealth of the person worth $17 billion?
Formula: FILTER(E1,C1=17)
Formula2: FILTER(E2:E11,C2:C11=17)
Level: easy