Question

A card is drawn at random from a pack of 100 cards numbered 1 to 100, the probability of drawing a number which is a square is

• A. $\frac{1}{5}$
• B. $\frac{2}{5}$
• C. $\frac{1}{10}$
• D. None of these

Answer 1

The correct option is C $\frac{1}{10}$

Total ways = 100, Squares of following no's
lie between 1 and 100,$1^2,2^2,3^2,4^2,5^2,6^2,7^2,8^2,9^2,{10}^2$ which are 10 in number.
So, required probability $=\frac{10}{100}=\frac{1}{10}.$