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29 November, 11:41

A science class consists of 14 boys and 15 girls.

Which expression can you use to find the number of ways the teacher can choose 5 girls to present their reports on Monday and 5 boys to present their reports on Tuesday?

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  1. 29 November, 12:42
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    (15C5) (14C5)
  2. 29 November, 12:59
    0
    (14 over 5) · (15 over 5)

    = 14·13·12·11·10/5! · 15·14·13·12·11/5!

    = 6012006

    (n over k) is the Binomial coefficient
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