Each factor of 240 is inscribed on its own plastic ball, and all of the balls are placed in a jar. If a ball is randomly selected from the jar, what is the probability that the ball is inscribed with a multiple of 15? Choose the most appropriate option
A) 1/16
B) 5/42
C) 1/8
D) 3/16
E) 1/4
the # of factors 240 has is 20;   so out of 20 factors only four are multiples of 15: 15, 30, 60, 120 and 240, itself;   So, the probability is 5/20=1/4.   Answer: 1/4.
<result>E</result>
Each factor of 240 is inscribed on its own plastic ball, and all of the balls are placed in a jar. If a ball is randomly selected from the jar, what is the probability that the ball is inscribed with a multiple of 15?