Company S produces two kinds of stereos: basic and deluxe. Of the stereoes produced by Company S, 2/3 were basic and the rest were deluxe. If it takes 7/5 as many hours to produce a delux stereo as it does a basic, the the number of hours it took to produce the delux stereos last month was what fraction of the total number of hours it took to produce all the stereos?
a) 7/17
b) 14/31
c) 7/15
d) 17/35
e) 1/2
a) 7/17
b) 14/31
c) 7/15
d) 17/35
e) 1/2
