Question

A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a perfect square number is:

विकल्प

• `1/10`

• `1/11`

• `1/90`

• `1/9`

Answer 1

`1/10`

Explanation:

Total number of box numbered from 1 to 90 = 90

Total number of perfect square = 9

i.e. S = (1, 4, 9, 16, 25, 36, 49, 64, 81)

P(s) = `9/90 = 1/10`