Respuesta :

rococo908

Answer:

100 pounds

Step-by-step explanation:

To find their average weight, add all of their weights together then divide it by 3

(100 + 120 + 80) / 3

300 / 3

= 100

So, their average weight is 100 pounds
100 + 120 + 80 = 300

300/3 = 100

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