The ratio by weight, measured in pounds, of books to clothes to electronics in a suitcase initially stands at 5:4:2. Someone removes 7 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 one: A) 6 B) 7 C) 8 D) 9 E) 10
The weights of the items in the suitcase are 5k, 4k, and 2k.   If removing 7 pounds of clothes doubles the ratio of books to clothes, then 7 pounds represents half the weight of the clothes.   2k = 7 pounds and then k = 3.5 pounds.   The electronics weigh 2(3.5) = 7 pounds.   The answer is 7.
<result>B</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 7 pounds of clothing from the suitcase, thereby doubling the ratio of books to clothes. How many pounds do the electronics in the suitcase weigh?