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A four digit number is formed by the digits 1, 2, 3, 4 with no repetition. The probability that the number is odd is.
  • a)
    zero
  • b)
    1/3
  • c)
    1/4
  • d)
    None of these
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A four digit number is formed by the digits 1, 2, 3, 4 with no repeti...
Total number of numbers = 4! = 24
For odd nos. 1 or 3 has to be at unit’s place
If 1 is at unit place, then total number of numbers = 3! = 6
And if 3 is at units place, then total number of numbers = 3! = 6
Total number of odd numbers = 6 + 6 = 12
Required Probability = 12/24 = 1/2
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A four digit number is formed by the digits 1, 2, 3, 4 with no repetition. The probability that the number is odd is.a)zerob)1/3c)1/4d)None of theseCorrect answer is option 'D'. Can you explain this answer?
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