Question:
A die is thrown once. What is the probability of getting a prime number?
Solution:
GIVEN: A dice is thrown once
TO FIND: Probability of getting a prime number.
Total number on a dice is 6.
Prime numbers on a dice are 2, 3 and 5
Total number of prime numbers on dice is 3
We know that PROBABILITY = 
Hence probability of getting a prime number = 
Hence probability of getting a prime number = 