Cards marked with numbers 13, 14, 15, ..., 60 are placed in a box and mixed thoroughly. One card is drawn at random from the box. Find the probability that number on the card drawn is
(i) divisible by 5
(ii) a number is a perfect square
GIVEN: Cards are marked with numbers 13 to 60 are placed in a box and mixed thoroughly. If one card is drawn at random from the box
TO FIND: Probability that it bears
(i) A number divisible by 5
(ii) A perfect square
Total number of cards is 
(i) Cards marked with a number divisible by 5 are
15, 20, 25, 30, 35, 40, 45, 50, 55 and 60
Total numbers of cards marked numbers divisible by 5 from 13 to 60 is 10
We know that PROBABILITY = 
Hence probability of getting card marked with numbers divisible by 5 from 13to60 is 
(ii) Cards marked a perfect squared numbers are 16, 25, 36 and 49
Total number of disc marked with perfect square from 13 to 60 is 4
We know that PROBABILITY =
Hence probability of getting disc marked with perfect square numbers from 13 to 60 is 