A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at
random from the box. Find the probability that it bears.
(iii) A two digit number (ii) A perfect square number (iii) A number divisible by 5.
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Answer:
(¡)81/90=9/10
(¡¡) 9/90=1/10
(¡¡¡) 18/90=1/5
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