(i) A box contins 80 discs, which are numbered from 1 to 80. If one disc is drawn at random from the
Channel: Doubtnut
Date: 2020-01-03

(i) A box contins 80 discs, which are numbered from 1 to 80. If one disc is drawn at random from the box, find the probability that it bears a perfect square number. (ii) A box contains 90 discs which are numbered 1to 90. If one disc is drawn at random from the box , find the probability that it bears (a) a two-digit number (b) a number divisible by 5