Question

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 1

Answer:

(1)- p(2 digit number) = 81/90

(2)- p (perfect sqare number) = 9/90 = 3/30

(3)- p (divisible by five) = 18/90