A number is selected at random from the first 30 natural numbers. What is the probability that the number is a multiple of either 5 or 12? Choices:
A) 17/30 B) 2/5 C) 7/15 D) 4/15 E) 11/30
Number of Multiples of 5 from 1 through 30 = 30/5= 
<gadget id="calculator">30/5</gadget>
<output>6</output>
6   Number of Multiples of 12 from 1 through 30= 30/12 = 2   Number of Multiples of 5 and 12 both from 1 through 30 = Number of Multiples of 12*5(=60) = 0   Total favourable cases = 6 + 2 - 0= 
<gadget id="calculator">6 + 2 - 0</gadget>
<output>8</output>
8   Probability= 8 / 30 = 4/15   Answer: option 4/15
<result>D</result>
A number is selected at random from the first 30 natural numbers. What is the probability that the number is a multiple of either 5 or 12?