math
posted by peter .
A twodigit number is chosen at random.What is the probability that the chosen number is a multiple of 7 ?
please answer and explain

math 
PsyDAG
14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91 and 98 are twodigit numbers that are multiples of 7.
There are 89 twodigit numbers (1099).
13/89 = ? 
math 
peter
But the answer is
a. 1/10
b. 1/9
c. 11/90
d. 12/90
e. 13/90 
math 
peter
I think is answer e

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