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Directrix

  • 3 years ago

In how many ways can 5 students be arranged for a group picture with 3 in the first row and 2 in the back row?

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  1. Directrix
    • 3 years ago
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    Hint: Whatever the answer, would it be the same if the 5 students were all on one row with the question being "In how many ways can 5 students be arranged in a row ( line )for a group photo?

  2. amitlpu91
    • 3 years ago
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    factorial 5 ways

  3. amitlpu91
    • 3 years ago
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    so wat now ?

  4. Directrix
    • 3 years ago
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    The two questions have the same answer: 120 ways. Three students on the first row and two in the back can be done in the same number of ways as 5 students arranged on one row.

  5. satellite73
    • 3 years ago
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    was this a quiz?

  6. Directrix
    • 3 years ago
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    Yu missed it. We're practicing combinatorics.

  7. satellite73
    • 3 years ago
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    ahh got it

  8. salini
    • 3 years ago
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    |dw:1330001939260:dw| each time i fill a place one student is taken from my option to fill the next seat as a single student cannot sit in boh seats

  9. salini
    • 3 years ago
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    both*

  10. Directrix
    • 3 years ago
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    The picture is right. Then, use the multiplication rule. 5*4*3*21 = 120 ways

  11. salini
    • 3 years ago
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    yeah i forgot to tell the main 'MULTIPLY' part

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