A number is selected from 1 to 25 TO FIND: Probability that, the number is a prime Total number is 25 Numbers from 1 to 25 that are primes are 2, 3, 5, 7, 11, 13, 17, 19 and 23 Total numbers that are primes from 1 to 25 is 9 `"We know that PROBABILITY" = "Number of favourable event"/"Total number of event"` Hence probability of getting a prime number from 1 to 25 is equal to `9/25` |