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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.
Sum
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Solution
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`
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Chapter 25: Probability - Exercise 25 (C) [Page 395]
