天山4-5

[Martina]

Q5.
A department manager distributed a number of pens, pencils, and pads among the staff in the department, with each staff member receiving x pens, y pencils, and z pads. How many staff members were in the department?
1. The numbers of pens, pencils, and pads that each staff member received were in the ratio 2:3:4, respectively.
2.The manager distributed a total of 18 pens, 27 pencils, and 36 pads.

ans: E

我是寫c 兩個合併就可知道了 不懂為什麼答案是e???

[Jessy]

Q5.
A department manager distributed a number of pens, pencils, and pads among the staff in the department, with each staff member receiving x pens, y pencils, and z pads. How many staff members were in the department?
1. The numbers of pens, pencils, and pads that each staff member received were in the ratio 2:3:4, respectively.
2.The manager distributed a total of 18 pens, 27 pencils, and 36 pads.

ans: E

我是寫c 兩個合併就可知道了 不懂為什麼答案是e???

pen:pencil:pad=2:3:4
每人拿2隻pen,3隻pencil,4個pad -->共有9個stuff
每人拿6隻pen,9隻pencil,12個pad -->共有3個stuff
會有兩組答案, 所以合併後不能選C

[davidlee0222]

還有一個人就拿了18、27、36的
到九個人拿2、3、4的
共有九種狀況

[chris8888]

不可能是九種狀況, 只有兩組. 9和3

因為1和2要合併考慮, 所以1限定了2:3:4

因此最終答案未決, 必選E