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How many four digit numbers can …

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How many four digit numbers can be formed using digits 1,1,2,2,3,3,4,4,5,5
  • 1 answers

Jaya Verma 6 years, 2 months ago

no. of 4 digit numbers in this case can be fined as 10 ! / 2! . 2! .2! .2! . 2!
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