#### [点此查看答疑][GWD]Data Sufficiency

题目看不懂

A total of 20 amounts are entered on a spreadsheet that has 5 rows and 4 columns; each of the 20 positions in the spreadsheet contains one amount. The average (arithmetic mean) of the amounts in row *i* is .The average of the amounts in column *j * is . What is the average of all 20 amounts on the spreadsheet?

(1)

(2)

D

- Jennifer: Video rental outlets in Centerville together
- Mourdet Winery: Danville Winery's new wine was introduced to
- Mourdet Winery: Danville Winery's new wine was introduced to
- United States manufacturers currently produce most
- The higher the level of certain vitamins and minerals
- Most of the world's supply of uranium currently