Lottery balls numbered consecutively from one through one hundred are placed in a spinner. If one ball is drawn at random, what is the probability that it will have the number 2 on it exactly once? Options
A) 9/100
B) 1/10
C) 18/100
D) 19/100
E) 1/5
Probability = No of balls with exactly one 2 / total number of balls   = {2,12,20,21,23 to 29, 32,42,52,62,72,82,92}/100   = 18/100   Answer is 18/100
<result>C</result>
Lottery balls numbered consecutively from one through one hundred are placed in a spinner. If one ball is drawn at random, what is the probability that it will have the number 2 on it exactly once?