Maths question!

A teacher wants to divide a class of 18 students into 3 groups, each of 6 students, to do 3 different statistical projects.In how many ways can the students be grouped?

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Answer:18C6*12C6*6C6=17153136

點解唔使除3!?

3 個解答

評分
  • 8 年前
    最愛解答

    因為係3 different statistical projects

  • 8 年前

    重點在於「3 different statistical projects」

    如果沒了這句,則需要除3!

  • 以我理解,每有EACH呢個字就是要除!

    Is it correct?

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