Hi
1100 people
≥ 1 Both 1
Microwave 860
DVD Player 740
1600 -590 = 1010
a. how many own either a microwave oven or a DVD player: 1010
b. how many own neither a microwave oven nor a DVD player: 1100-1010 = 90
c. How many own a microwave oven and do not own a DVD player = 860-590= 270