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Math Help - data questions

  1. #1
    Senior Member
    Joined
    Oct 2008
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    323

    data questions

    1. The final score of a soccer game is 6 to 3. How many different scores were possible at half-time?

    2. Evaluate the following

    a) \frac{11!}{9!}

    b) \frac{8!}{5!2!}

    c) \frac{15!}{3!8!}<br />

    d) \frac{14!}{4!5!}

    I tried doing these in my calculator but you cannot because the numbers are too big.
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  2. #2
    Member
    Joined
    Dec 2008
    From
    Auckland, New Zealand
    Posts
    189
    (2) Do some canceling of common terms first.

    \frac{11!}{9!} = \frac{11 \times 10 \times 9 \times 8 \times 7 \times 6 ...\times 1}{9 \times 8 \times 7 \times 6... \times 1} = 11 \times 10

    Do this for the others and cancel factors than appear on both the top and bottom. Then the multiplications should be able to be done on your calculator. Strange your calculator can't do them the way they are - most calculators can handle factorials up to about 69!
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