In how many different ways can the letters of the word ARRANGEMENTS be arranged?
Find the probability that an arrangement chosen at random begins with the
letters EE.
probability?
2015-11-04 1:56 pm
回答 (1)
2015-11-04 2:57 pm
✔ 最佳答案
1"ARRANGEMENTS"
A：2 R：2 N：2 G：1 E：2 M：1 T：1 S：1
∴ 12! / (2! 2! 2! 2!) = 29937600 ways.
2
Begins with the letters EE
E E _ _ _ _ _ _ _ _ _ _
∴Probability = [10! / (2! 2! 2!)] / 29937600 = 1 / 66
收錄日期: 2021-04-21 23:22:32
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