Question

There are 100 pages in a book. If a page of the book is opened at random, the probability that the number on the page is a two digit number made up with the same digit is

• A. $\frac{8}{100}$
• B. $\frac{9}{100}$
• C. $\frac{1}{10}$
• D. $\frac{8}{10}$

Answer 1

Answer: (B)

$\frac{9}{100}$

Favorable cases for $100$ pages book in which two digit number made up with the same digit: $11,22,33,44,55,66,77,88,99$
There are $9$ cases, so probability will be $\frac{9}{100}$.