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 i bears.
i) a two-digit number
i) a perfect square number
ii) a prime number less than 15​

Answer 1

Answer:

i) 81/90=9/10

P(e)=9/10

ii)9/90=1/10

P(e)=1/10

iii)18/90=1/5

P(e)=1/5