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Answered

1. Find the number of permutations of 7 different objects taken 4 at a time without repetition.​

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KizunaHighviz

PERMUTATIONS

Given

  • Total number of items (n) = 7
  • Number of items being chosen (r) = 4

P (n,r) = n! / (n - r)!

P (7,4) = 7! / (7 - 4)!

P (7,4) = 7! / 3!

P (7,4) = 7 • 6 • 5 • 4 • 3! / 3!

P (7,4) = 7 • 6 • 5 • 4

P (7,4) = 840 permutations

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