[計量] CAT Test 1&2
Test 1 No. 16
Pat goes to the toy store to buy 2 distinct balls, either a football,
basketball, or soccer balls, and 3 different board games. If the toy
store is stocked with all types of balls but only 6 different types
of board games, how many different selections of 5 items can Pat make?
(A)18 (B)20 (C)40 (D)60 (E)162
參考答案是D
我卻找不到我的答案@@
我的算法: {3(球的組合)}x{6x5x4(遊戲的選法)}=360
Test 2 No. 23
Three friends are playing a game in which each person simultaneous displays
one of the three hand sign: a clenched fist, a open palm, or two extened
fingers. How many different combinations fo the signs are possible?
(A)7 (B)9 (C)10 (D)12 (E)27
答案是C
但我選的是E (3x3x3=27, 三個人各有3種出法，所以相乘)
還請高手能賜教!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 59.189.48.165
討論串 (同標題文章)
以下文章回應了本文：
完整討論串 (本文為第 1 之 2 篇)：
GRE 近期熱門文章
PTT職涯區 即時熱門文章
