anonymous
  • anonymous
Q-11 How many numbers consisting of two digits can be formed from 2, 3 5,7. Each integer is to be used only once
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
\[4P2\]
anonymous
  • anonymous
=12
anonymous
  • anonymous
how

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anonymous
  • anonymous
why not 4c 2
anonymous
  • anonymous
That's because the order of the numbers forming the integer matters. Each integer can be only be used once.
anonymous
  • anonymous
If you used 4C2, then e.g. 23 and 32 will be counted as one combination. Using 4P2, counts them as two different combinations. They are two distinct integers after all.
anonymous
  • anonymous
Thanks
anonymous
  • anonymous
ghgjh

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