Multiple choice

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 multiple of $5$?

  1. $\displaystyle \frac{1}{5}$
  2. $\displaystyle \frac{2}{5}$
  3. $\displaystyle \frac{3}{5}$
  4. $\displaystyle \frac{4}{5}$
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A Correct answer
Explanation

Multiples of 5 between 1 and 20 are 5, 10, 15, 20. There are 4 such numbers. Probability = 4 / 20 = 1/5.

AI explanation

The total number of possible outcomes is 20, since there are 20 cards. The multiples of 5 between 1 and 20 are 5, 10, 15, and 20, meaning there are 4 favorable outcomes. Using the classical probability formula of favorable outcomes divided by total outcomes, the probability is 4 divided by 20, which simplifies to 1/5.

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