Respuesta :
Answer:
25.5
Step-by-step explanation:
To find the mean of all the people, do 31 plus 20 divided by 2( category of 2 means) = 51/2 = 25.5
Hope this helps
Answer: 28 years
Step-by-step explanation:
To combine the data for all the workers, multiply 31×10 the total ages of the women and 20× 3 for the total ages of the men.
Add 310+60= 370. Then divide by 13, the total number of workers. 370÷13=28.46. You can round to 28 years.