Answer:
E.
Step-by-step explanation:
E is the correct answer because the relative frequency is the proportion of citizens from that town. That is why A and B are wrong because one city might have a higher proportion, but still less in favor.
ax7=7 x 1/7(b+c-d)
7a=b+c-d
7a-c+d=b
b=7a-c+d
531441