television ---> 8
radio ---> 7
newspaper ---> 3
magazine ---> 2
statement 1
television ---> 8 --->
18,750+x or (x/3)*8
radio ---> 7 ---> (x/3)*7
newspaper ---> 3 ---> x
magazine ---> 2 ---> (x/3)*2
from that we can conclude that:
18,750+x = (x/3)*8
18,750*3+3*x = 8*x
(18,750*3)/5 = x
x = 11,250
radio ---> (x/3)*7 = 26,250
sufficient
statement 2
television ---> 8 ---> (7500/2)*8
radio ---> 7 ---> (7500/2)*7
newspaper ---> 3 ---> (7,500/2)*3
magazine ---> 2 ---> 7500/2
can be solved !
radio ---> (7500/2)*7 = 26,250
sufficient
the answer is (D)