Question:
What is the probability that a number selected at random from the numbers 3, 4, 5, ....9 is a multiple of 4?
Solution:
GIVEN: numbers are 3, 4, 5, 6…9
TO FIND: Probability of Getting multiple of 4
Total number is 9−3+1=7
Numbers which are multiple of 4 between 3 and 9 are 4 and 8
Total number which are multiple of 4 between 3 to 9 is 4 and 8 is 2
We know that PROBABILITY = 
Hence probability of getting a number which is a multiple of 4 is 
Hence probability of getting a number which is a multiple of 4 is equal to