Two families are planning to go on a canoe trip together. The families
, e) h2 u/ u* A$ uconsist of the following people:
% Z1 C* }- u: f! m& @; H, E Robert and Mary Henderson and their three sons, Tommy, Dan, and William;
* @! G$ k b* p* F3 Q8 ` Jerome and Ellen Penick and their two daughters, Kate and Susan. % W; S% }! A* d; I0 \2 S
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There will be three canoes, with three people in each canoe. 5 a! n F: c6 g* D/ n" q3 p& e' J
At least one of the four parents must be in each canoe. # C" G% w! Y' @ c( R1 a1 h
At least one person from each family must be in each canoe. " E, p/ L" c/ X' U. M4 m( O
If the two mothers ride together in the same canoe, and the three brothers
. E7 S1 |7 t; c3 v) ?each ride in a different canoe, which of the following must be true?
4 x/ H0 z9 A/ K9 F Each canoe has both only male and females in. " a- j8 D. ?; F! `7 ~; N1 x
One of the canoes has only females in it.
$ S! k6 @5 F+ n! R One of the canoes has only males in it.
# u" `) m* u/ P. e- P. h The sisters ride in the same canoe. 6 @6 Q; ?# `+ ]0 L& H
The fathers ride in the same canoe. 8 V6 y. u: ~. A; O, ^& F+ A. a
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# f$ i" E) X9 o2 e; h& R; C6 E答案:(A) ) u5 w( u; P7 b' @9 ?8 V
& z! a n v$ i. {$ jIf Ellen and Susan are together in one of the canoes, which of the following
5 S" a3 e5 X& L8 ~; [6 @% j" v5 Bcould be a list of the people together in another canoe? , a9 L+ { W9 [( [* f
Dan, Jerome, Kate
% X3 V0 R1 a8 {5 F# B& W Dan, Jerome, William
6 L6 h' c. t5 f! {/ e Dan, Kate, Tommy 1 _: {% |: [; B1 v
Jerome, Kate, Mary 9 f/ N5 p% e6 i' ]( E
Mary, Robert, Tommy
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8 R) I0 d7 i/ I2 d0 @* x" \————————————————————————
4 s+ D4 }1 k2 G4 o- R4 d: G( Q答案:(B) ' X. c2 R: p( Q7 N% b
& G' j2 S! ` t5 P7 @% d; sIf Jerome and Mary are together in one of the canoes, each of the following ! ^* r: U+ E! F c* t* J
could be a list of the people together in another canoe EXCEPT
( o' w( ~. J% j9 KDan, Ellen, Susan 6 {6 O' ]' E6 M w! C; ?; h
Ellen, Robert, Tommy
$ E( \* S/ D& L& rEllen, Susan, William 1 `8 x5 m2 h" {) P9 e( `% A, J
Ellen, Tommy, Wiliam / l, n1 p% G* f( r$ ?
Kate, Robert, Susan
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答案:(B) 5 o# G7 H0 x0 [& ^& o8 ~% i
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If each of the Henderson children rides in a different canoe, which of the 3 H' D- S% K/ X
following must be true?
4 a3 \' T y1 w1 m6 }8 q ⅠThe Penick children do not rode together. 3 _, x# c8 e" E
ⅡThe Penick parents do not ride together. " n, s6 }* {, y
Ⅲ The Henderson parents do not ride together. ' \2 c& Q4 _* [$ K5 ~- D
Ⅰonly : q' i1 e/ C9 s; q
Ⅱonly & [* A6 p, }3 V1 o
ⅠandⅡonly ! d2 W6 c8 W0 c, S2 ~/ q( `% Y
Ⅰand Ⅲ only
/ j y9 I$ }2 |7 V, dⅠ,Ⅱ, and Ⅲ
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/ V1 \) [. S* }0 F" [答案:(D) |