The ratio by weight, measured in pounds, of books to clothes to electronics in a suitcase initially stands at 7:4:3. Someone removes 6 pounds of clothing from the suitcase, thereby doubling the ratio of books to clothes. How many pounds do the electronics in the suitcase weigh?
Choose the correct option.
A) 1	B) 3	C) 5	D) 7	E) 9
The weights of the items in the suitcase are 7k, 4k, and 3k.   If removing 6 pounds of clothes doubles the ratio of books to clothes, then 6 pounds represents half the weight of the clothes.   2k = 6 pounds and then k = 3 pounds.   The electronics weigh 3(3) = 9 pounds.   The answer is 9.
<result>E</result>
The ratio by weight, measured in pounds, of books to clothes to electronics in a suitcase initially stands at 7:4:3. Someone removes 6 pounds of clothing from the suitcase, thereby doubling the ratio of books to clothes. How many pounds do the electronics in the suitcase weigh?