He has has ten patterns of chairs and eight patterns of tables
Hence, A chair can be arranged in 10 ways and
A table can be arranged in 8 ways
Hence one chair and one table can be arranged in 10 x 8 ways = 80 ways
An design manager has 10patterns of chairs & 8patterns of tables. In how many ways can he make a pair of table & chair?

A. 20
B. 40
C. 80
D. 90
E. 100