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 4 on it exactly once?  Choose one:  A) 9/100  B) 1/10  C) 11/100  D) 18/100  E) 1/5
Probability = No of balls with exactly one 1 / total number of balls   = {4,14,24,34,40,41,42,43,45 to 49,54,64,74,84,94}/100   = 18/100   Answer is 18/100
<result>D</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 4 on it exactly once?