a)how many different six letter arrangements can be written
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a)how many different six letter arrangements can be written using the letters in each given word?b)how many different arrangements begin with E c)if an arrangement is chosen at random,what is the probability that it begins with
单词是 freeze 与 deeded
单词是 freeze 与 deeded
楼上是绝对的软件翻译.
a) 用freeze与deeded二词中六个字母能分别组成多少种不同的组合?
freeze: (6x5x4x3x2x1) 除以 (3x2x1) 等于 120种
deeded: (6x5x4x3x2x1) 除以 (3x2x1) 再除以 (3x2x1) 等于20种
b) 多少种组合首字母为 E?
freeze: (1x5x4x3x2x1) 除以 (2x1) 等于 60种
deeded: (1x5x4x3x2x1) 除以 (3x2x1) 再除以 (2x1) 等于10种
c) 如果随即抽取一种组合,那么该组合首字母为E的几率有多大?
freeze: 60 除以 120 = 50%
deeded: 10 除以 20 = 50%
希望我没做错阿 哈哈 高中的东西
a) 用freeze与deeded二词中六个字母能分别组成多少种不同的组合?
freeze: (6x5x4x3x2x1) 除以 (3x2x1) 等于 120种
deeded: (6x5x4x3x2x1) 除以 (3x2x1) 再除以 (3x2x1) 等于20种
b) 多少种组合首字母为 E?
freeze: (1x5x4x3x2x1) 除以 (2x1) 等于 60种
deeded: (1x5x4x3x2x1) 除以 (3x2x1) 再除以 (2x1) 等于10种
c) 如果随即抽取一种组合,那么该组合首字母为E的几率有多大?
freeze: 60 除以 120 = 50%
deeded: 10 除以 20 = 50%
希望我没做错阿 哈哈 高中的东西
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