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AP EAMCET202418 May 2024Morning ShiftMathematicsProbabilityActual

If 5 letters are to be placed in 5 -addressed envelopes, then the probability that at least one letter is placed in the wrongly addressed envelope is

Options

  1. A1 5
  2. B1 120
  3. C4 5
  4. D119 120

Correct answer

D. 119 120

Step-by-step solution

Since, total number of ways in which 5 letters are placed in 5 -addressed envelopes =5!=120 Now, the probability of all letters placed is correct placed = 1 120 So, P (at least one letters wrongly) =1- 1 120 = 119 120

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