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Homework Help: Permutation and combination

  1. Oct 8, 2012 #1
    1. The problem statement, all variables and given/known data
    A crew of an 8 oar boat has to be selected from 11 people, out of which 5 can oar only on one side, 4 can oar only on the other side and 2 can oar on either sides, find in how many ways can the selection be done?

    3. The attempt at a solution

    What I did here is assumed 3 possibilities
    1. 7 on one side and 4 on the other---- assuming those two to be on one side
    2. 6 on one side and 5 on the other---- equally dividing them on each side
    3. 5 on one side and 6 on the other---- equally dividing them on each side
  2. jcsd
  3. Oct 9, 2012 #2


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    Gold Member

    In Oaring a boat, you have to man equal strength on either side or the boat will no go straight. Here, select 4 people for right side and 4 people for left side.
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