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March 28, 2017

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A two-digit number is chosen at random.What is the probability that the chosen number is a multiple of 7 ?

please answer and explain

  • math - ,

    14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91 and 98 are two-digit numbers that are multiples of 7.

    There are 89 two-digit numbers (10-99).

    13/89 = ?

  • math - ,

    But the answer is

    a. 1/10
    b. 1/9
    c. 11/90
    d. 12/90
    e. 13/90

  • math - ,

    I think is answer e

  • math - ,

    You are right. I forgot to include the 10 in the range.

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