SOLUTION: there are 11 people in an office with 3 different phone lines. If all the lines begin to ring at once, how many groups of 3 people can answer these lines?

Question 1022083: there are 11 people in an office with 3 different phone lines.
If all the lines begin to ring at once, how many groups of 3
people can answer these lines?
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!
there are 11 people in an office with 3 different phone lines.
If all the lines begin to ring at once, how many groups of 3
people can answer these lines?

Choose the person to answer the first phone in 11 ways.
That leaves 10 people to choose to answer the second phone.
That leaves 9 people to choose to answer the third phone.

Answer 11*10*9 = 11P3 = 990 ways

Edwin

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