建议使用官方纸质指南,查看对照完整题目
【OG20-P273-238题】
Each of the 256 solid-colored marbles in a box is either blue, green, or purple . What is the ratio of the number of blue marbles to the number of purple marbles in the box?(1)The number of green marbles in the box is 4 times the number of blue marbles in the box.(2)There are 192 green marbles in the box.
-
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx



b+g+p=256,求b:p
条件1:g=4b,具体数量未知,不充分
条件2:g=192,b:p无法求出,不充分
结合:b=48,p=16,b:p=3:1,充分
题目讨论 (1条评论)

-
1277528tdqt
X+4x+y=256/ 4x=194, 两个一起才是充足条件。任何一个都不是充足条件
0
0 回复 2020-06-11 00:08:59