Question

A bag contains 100 identical marble stones which are numbered 1 to 100. If one stone is drawn at random from the bag, find the probability that it bears a number divisible by 4 and 5.

Answer 1

Total number of possible outcomes = 100 

Numbers which are divisible by 4 and 5 = 20, 40, 60, 80, 100 

Number of favorable outcomes = 5 

P(number divisible by 4 and 5) = `5/100 = 1/20`