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maths-urgently needed

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A number of 4 different digits is formed by using 1, 2, 3, 4, 5, 6, 7. Find
the probability that it is divisible by 5.
Digits can be repeated

  • maths-urgently needed -

    It must end in a 5

    number of cases = 7x7x7x1 = 343

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