nayelividales3586 nayelividales3586
  • 20-05-2019
  • Mathematics
contestada

There are 17 people in an office with 5 different phone lines. If all the lines begin to ring at once, how many groups of 5 people can answer these lines?

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Luv2Teach
Luv2Teach Luv2Teach
  • 27-07-2019

Answer:

6188 different combinations of people

Step-by-step explanation:

This is a combination problem since it does not matter the order of people that answer the phones.  The combination looks like this:

₁₇C₅ = [tex]\frac{17!}{5!(17-5)!}[/tex]

This expands to

[tex]\frac{17*16*15*14*13*12!}{5*4*3*2*1(12!)}[/tex]

The 12! cancels out in the top and bottom so the remaining multiplication leaves you with

₁₇C₅ = [tex]\frac{742560}{120}[/tex]

which divides to 6188

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