For a certain sport, a team of three players is to be chosen from a group of eight players, according to the following conditions: (1)If neither A nor B plays, then C must play. (2)B refuses to play w 题目和参考答案——青夏教育精英家教网—

题目内容

　　For a certain sport, a team of three players is to be chosen from a group of eight players, according to the following conditions:

　　(1)If neither A nor B plays, then C must play.

　　(2)B refuses to play with H.

　　(3)If C plays, then D does not play.

　　(4)If E plays, then F must also play .

　　(5)If G does not play, then H and either A or B must play.

1．Three players will be chosen from ________ players.

[　　]

A．only five

B．more than eight

C．four plus four

D．seven

2．Which of the following may be concluded from the conditions given?

[　　]

A．If A and B do not play, D does not play.

B．If G plays, H does not play.

C．If either A or B plays, then C does not play.

D．If E does not play, then F does not play.

3．On how many different teams may E play?

[　　]

A．0

B．1

C．2

D．3

4．Which of the following teams may be chosen without doing anything against any of the conditions given?

Ⅰ．ACG

Ⅱ．CFG

Ⅲ．BDE

[　　]

A．Ⅰonly

B．Ⅲonly

C．ⅠandⅡonly

D．ⅡandⅢonly

5．If both F and G are ill and unable to play, how many different teams may be chosen?

[　　]

A．0

B．1

C．2

D．3

答案：C;A;D;C;C

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