13 is the ratio of 13 to 1, so it's rational.
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There are (99 - 9) = 90 2-digit numbers.13 of them are multiples of 7.The probability is 13/90 = 14.4% (rounded)
A positive number.
Digit
It is: 19-7 = 12
Just substitute 4 in for X. 13 - 2(4) 13 - 8 = 5 ===