The ratio by weight, measured in pounds, of books to clothes to electronics in a suitcase initially stands at 5:4:2. Someone removes 9 pounds of clothing from the suitcase, thereby doubling the ratio of books to clothes. How many pounds do the electronics in the suitcase weigh?  Options.
A) 7  B) 8  C) 9  D) 10  E) 11
The weights of the items in the suitcase are 5k, 4k, and 2k.   If removing 9 pounds of clothes doubles the ratio of books to clothes, then 9 pounds represents half the weight of the clothes.   2k = 9 pounds and then k = 4.5 pounds.   The electronics weigh 2(4.5) = 9 pounds.   The answer is 9.
<result>C</result>
The ratio by weight, measured in pounds, of books to clothes to electronics in a suitcase initially stands at 5:4:2. Someone removes 9 pounds of clothing from the suitcase, thereby doubling the ratio of books to clothes. How many pounds do the electronics in the suitcase weigh?