Respuesta :

Stephen46

Answer:

The answer is A = { 5 , 6 , 7 }

Step-by-step explanation:

Since all the members in A = { 5 , 6 , 7 } are all in the universal set

R= {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

Which makes A = { 5 , 6 , 7 } a subset.

Hope this helps