3 years ago

(a) How many ways are there to arrange 3 people in a line (order matters) using a group of 5 people?

Mathematics

1 answer:

mart [117]3 years ago

7 0

Answer:

60.

Step-by-step explanation:

This is a permutation exercise because order matters. The formula is n!/(n-r)!. In this case n=5 and r=3 so,

5!/(5-3)! = 5!/2! = 5!/2 = (5*4*3*2*1)/2 we can simplify the 2 and obtain 5*4*3= 60.

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