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How many passengers can be seated on a plane with r rows, if

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How many passengers can be seated on a plane with r rows, if [#permalink] New post 07 Aug 2003, 23:48
How many passengers can be seated on a plane with r rows, if each row consists of d double seats and t tripple seats?
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 [#permalink] New post 08 Aug 2003, 08:36
If two people can sit in a double seat, then that is 2d.
If three people can sit in a triple seat, then that is 3t.
So for one row it would be 2d + 3t.
For r rows it would be r(2d+3t).

I hope I understood the q correctly :oops:
  [#permalink] 08 Aug 2003, 08:36
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