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MHT CET20227 Aug 2022Morning ShiftMathematicsProbabilityActual

Five letters are placed at random in five addressed envelopes. The probability that all the letters are not dispatched in the respective right envelopes is

Options

  1. A1 120
  2. B1 5
  3. C119 120
  4. D4 5

Correct answer

C. 119 120

Step-by-step solution

The number of ways in which all the litters go to the correct envelope is 1 Probability that all letter go to correct envelope = 1 5 ! Probability that all letter do not go to correct envelope =1- 1 5 ! = 119 120

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