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Real Numbers

Question
CBSEENMA10009450
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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 (i) a two digit number, (ii) a perfect square number, (iii) a number divisible by 5.

Solution

Solution not provided.
Ans.   left parenthesis straight i right parenthesis space 9 over 10 space space left parenthesis ii right parenthesis space 1 over 10 space space left parenthesis iii right parenthesis space 1 fifth

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