Mary, Peter, and Lucy were picking chestnuts. Mary picked twice as much chestnuts than Peter. Lucy picked 3 kg more than Peter. Together the three of them picked 27 kg of chestnuts. How many kilograms of chestnuts did Mary, Peter, and Lucy pick respectively?
Choose one
A) 6, 9 and 12 B) 12, 9 and 6 C) 9, 6 and 12 D) 12, 6 and 9 E) 6, 12 and 9
M = 2P   L = P+3   M + P + L = 27   2P + P + (P+3) = 27   P = 6, M = 12, L = 9   Therefore, Mary, Peter, and Lucy picked 12, 6, and 9 kg, respectively.   The answer is 12, 6 and 9.
<result>D</result>
Mary, Peter, and Lucy were picking chestnuts. Mary picked twice as much chestnuts than Peter. Lucy picked 3 kg more than Peter. Together the three of them picked 27 kg of chestnuts. How many kilograms of chestnuts did Mary, Peter, and Lucy pick respectively?