[計量] 請益2題計量
Column A Column B
The number of ways 720
that a bracelet may
be strung up with seven
different color beads.
ANS: B (這題根本看不太懂)
If a bowl contains seven marbles, three red and four green,
four marbles are drawn from the bowl at random without replacement.
What is the probability that contains two red marbles and two green ones?
(A) 3/35
(B) 4/35
(C) 18/35
(D) 3/7
(E) 4/7
ANS: C (我想很久 都寫A...)
※ 編輯: sunrise5566 來自: 218.167.84.34 (07/08 19:58)
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