Question

A Class IX English book contains 200 pages. A page is selected at random. What is the probability that the number on the page is divisible by 10?

Answer 1

Correct Answer - `(1)/(10)`

Answer 2

No. Of cases that the number on the page is divisible by 10 = {10,20,30,.....200}

Now it is an A.P.

To find n use formula of last term i.e. \(a_n = a + (n-1) d\)

200 = 10 + (n-1) 10

So n = 20

Probability = possible outcome/ Total outcome

= 20/200 = 1/10