Respuesta :
The total participants were:
30 + 50 + 40 + 10
= 100
Out of which:
30 were 0-19 years old
50 were 20-39 years old
40 were 40-59 years old
10 were 60-79 years old
30 + 50 + 40 + 10
= 100
Out of which:
30 were 0-19 years old
50 were 20-39 years old
40 were 40-59 years old
10 were 60-79 years old
The answer would be A.
Hope this can help❤
Have a nice day :)
~Amy