Answer:
Blue pens: 30%
Black pens: 44.8%
Pencils: 25.2%
400 people: 280 people
Step-by-step explanation:
Begin by adding up everyone:
75+112+63= 250
Percentage of blue pens:
75/250= 30.0%
Percentage of black pens:
112/250= 44.8%
Percentage of pencils:
63/250= 25.2%
400 people:
280 people
