Question:
What is the probability that a number selected from the numbers 1, 2, 3, ...,15 is a multiple of 4?
Solution:
GIVEN: Numbers are from 1 to 15. One number is selected
TO FIND: Probability that the selected number is multiple of 4
Total number is 15
Numbers that are multiple of 4 are 4,8,12,
Total number which is multiple of 4 is 3
We know that PROBABILITY = 
Hence probability of selecting a multiple of 4 is 