Question

A page is opened at random from a book containing $90$ pages. Then probability of a page number is a perfect square, is _____.

Answer 1

Number of perfect square from $1$ to $90$ are $1,4,9,16,25,36,49,64,81$.

Total cases $=90$

Favorable cases $=9$

Therefore, probability $=\frac{9}{90}=\frac{1}{10}$