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A four digit number is formed using the digits 1, 2, 3, 5 with no repetitions. Find the probability that the number is divisible by 5.

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1 Answer

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For the number divisible by 5 from given digits 1, 2, 3, 5, unit digit must be 5.

Total 4 digit numbers = 4!

4 digit numbers with 5 at unit place = 3!

Required probability = \(\frac{3!}{4!}\) = \(\frac{6}{24}\) = \(\frac{1}{4}\)

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