An event manager has ten patterns of chairs and eight patterns of tables. In how many chairs can he make a pair of table and chair?
Pick.
A) 100 B) 120 C) 60 D) 80 E) 90
He has 10 patterns of chairs and 8 patterns of tables.   Hence,A chair can be arranged in 10 ways   A table can be arranged in 8 ways   Hence one chair and one table can be arranged=10*8= 
<gadget id="calculator">10*8</gadget>
<output>80</output>
80 ways   Option 80
<result>D</result>
An event manager has ten patterns of chairs and eight patterns of tables. In how many chairs can he make a pair of table and chair?