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.
Answer
This question is exactly same as Ex 15.1, 18 of Chapter 12 Class 10 in the NCERT Book.
Please check the answer and video here