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adnanchowdhury

  • 2 years ago

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?

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  1. adnanchowdhury
    • 2 years ago
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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. indianalexander
    • 2 years ago
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    your working is right as far as i can tell...

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

  4. indianalexander
    • 2 years ago
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    has to be.

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

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

  7. amistre64
    • 2 years ago
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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

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