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adnanchowdhury Group Title

Calculate the number of arrangements of the letters in the word NUMBER? One of the arrangement of the word NUMBER above is chosen at random.What is the probability that it begins and ends with a vowel?

  • 2 years ago
  • 2 years ago

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  1. adnanchowdhury Group Title
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    First question is easy. 6! = 720. Second question i got my answer to be: 2 x 4! = 48. Therefore probability is 48/720 = 1/15. But the answer in the book says 1/45.

    • 2 years ago
  2. indianalexander Group Title
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    your working is right as far as i can tell...

    • 2 years ago
  3. adnanchowdhury Group Title
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    I'm thinking it's an error in the book?

    • 2 years ago
  4. indianalexander Group Title
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    has to be.

    • 2 years ago
  5. FoolForMath Group Title
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    I am getting the same result as you.

    • 2 years ago
  6. adnanchowdhury Group Title
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    Ok thanks guys. I think it's book's mistake.

    • 2 years ago
  7. amistre64 Group Title
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    u (4*3*2*1) e = 24 ways = 48 ways e (4*3*2*1) u = 24 ways 48 ------ = 2/30 = 1/15 ..... so, yeah 24*30

    • 2 years ago
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