miinadiina miinadiina
  • 22-09-2020
  • Mathematics
contestada

HELP PLS I NEED THIS LUV U

HELP PLS I NEED THIS LUV U class=

Respuesta :

swan85 swan85
  • 22-09-2020

Answer:

24

Step-by-step explanation:

the set of numbers are{3,2,7,9}  four numbers

you have 4 choices n!=4!=4*3*2*1=24

the number of choices minus set of 3 digit numbers(no repetition)

(n-r)! without repetition :(4-3)!=1!=1

P=24 3-digit numbers if no repetition allowed

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