Question

A box contains $20$ cards marked with the numbers $1$ to $20$. One card is drawn from this box at random. What is the probability that number on the card is a perfect square?

• A. $\frac{1}{5}$
• B. $\frac{2}{5}$
• C. $\frac{3}{5}$
• D. $\frac{4}{5}$

Answer 1

Answer: (A)

$\frac{1}{5}$

Sample space$=20$
Perfect square in samples$=4(1,4,9,16)$
probability of perfect square $=1/5$