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 num- ber (iii) a number divisible by 5.​

Answer 1

Step-by-step explanation:

we know that the total number of discs=90

i) Let A be the probability getting a 2 digit number

therefore

P(A)=81/90 = 9/10

ii) Let B be the probability of getting a square number

therefore,

P(B) = 9/90= 1/10