Table:
0
A
B
C
D
1
region id
storm id
number city affected
affected region
2
1
1
10.0
3
2
1
15.0
4
3
3
30.0
5
1
4
22.0
6
12
5
37.0
7
2
5
12.0

Questions and formulas:
Question: How many regions are affected?
Formula: SUMMARIZE(D1,SUMX(A1))
Formula2: SUMMARIZE(D2:D7,SUMX(A2:A7))
Level: easy
Question: Count the number of different affected regions.
Formula: ROWS(UNIQUE(D1))
Formula2: ROWS(UNIQUE(D2:D7))
Level: easy
Question: How many regions were affected?
Formula: ROWS(UNIQUE(D1))
Formula2: ROWS(UNIQUE(D2:D7))
Level: easy