Table:
0
A
B
C
D
E
F
1
District
Incumbent
Party
First elected
Result
Candidates
2
Kentucky 1
Noble Jones Gregory
Democratic
1936
Re-elected
Noble Jones Gregory (D) Unopposed
3
Kentucky 2
John A. Whitaker
Democratic
1948
Re-elected
John A. Whitaker (D) Unopposed
4
Kentucky 4
Frank Chelf
Democratic
1944
Re-elected
Frank Chelf (D) Unopposed
5
Kentucky 6
Thomas R. Underwood
Democratic
1948
Re-elected
Thomas R. Underwood (D) Unopposed
6
Kentucky 7
Carl D. Perkins
Democratic
1948
Re-elected
Carl D. Perkins (D) 56.1% O. W. Thompson (R) 43.9%
7
Kentucky 8
Joe B. Bates
Democratic
1930
Re-elected
Joe B. Bates (D) 60.5% Elmer C. Roberts (R) 39.5%

Questions and formulas:
Question: How many results for minimum first elected incumbent Noble Jones Gregory?
Formula: MINIFS(D1,B1,"Noble Jones Gregory")
Formula2: MINIFS(D2:D7,B2:B7,"Noble Jones Gregory")
Level: easy
Question: How many results for incumbent Noble Jones Gregory?
Formula: ROWS(UNIQUE(FILTER(A1, B1="Noble Jones Gregory")))
Formula2: ROWS(UNIQUE(FILTER(A2:A7, B2:B7="Noble Jones Gregory")))
Level: medium