18.A box contains 90 discs which are numbered from 1 to 90. If onÄ – InterviewSolution

1.	18.A box contains 90 discs which are numbered from 1 to 90. If onÄ disc is drawn at randomfrom the box, tind the probability that it bears (i) a two-digit number (i) a perfectsquare number (ii) a number divisible by 5.
Answer» Possible number of outcomes=90(i) Number of two digit numbers=81Probability=81/90=9/10(ii)Number of perfect squares=9Probability=9/90=1/10(iii) Number of numbers divisible by 5=18Probability=18/90=1/5

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