Answer:
3500 people would need to show for the average to be 3000
Step-by-step explanation:
To solve an average, you use:
[tex]\frac{n1 + n2 + n3+...}{n}\\[/tex]
[tex]\frac{2580+2920+x}{3}=3000[/tex]
[tex]2580+2920+x=9000\\x = 9000-2580-2920\\x = 3500\\[/tex]
