company s produces two kinds of stereos : basic and deluxe . of the stereos produced by company s last month , 2 / 3 were basic and the rest were deluxe . if it takes 6 / 5 as many hours to produce a deluxe stereo as it does to produce a basic stereo , then the number of hours it took to produce the deluxe stereos last month was what fraction of the total number of hours it took to produce all the stereos ?
"# of basic stereos was 2 / 3 of total and # of deluxe stereos was 1 / 3 of total , let ' s assume total = 15 , then basic = 10 and deluxe = 5 . now , if time needed to produce one deluxe stereo is 1 unit than time needed to produce one basic stereo would be 6 / 5 units . total time for basic would be 10 * 1 = 10 and total time for deluxe would be 5 * 6 / 5 = 6 - - > total time for both of them would be 10 + 6 = 16 - - > deluxe / total = 6 / 16 . answer : a ."
divide(add(3, 2), const_10)