Respuesta :
Answer:
x = - 10
Step-by-step explanation:
Average is calculated as
average = [tex]\frac{sumofdata}{count}[/tex] , thus
[tex]\frac{16+x+3}{3}[/tex] = 3
Multiply both sides by 3 to clear the fraction
19 + x = 9 ( subtract 19 from both sides )
x = - 10
