Multiple choice

A box contains 20 balls bearing numbers, $1,2,3,4, ....., 20$. A ball is drawn at random from the box. What is the probability that the number on the ball is an odd number.

  1. $\dfrac{1}{2}$
  2. $\dfrac{1}{4}$
  3. $\dfrac{1}{5}$
  4. $\dfrac{1}{6}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Numbers 1 to 20 contain 10 odd numbers (1, 3, 5, 7, 9, 11, 13, 15, 17, 19). Probability = 10/20 = 1/2.

AI explanation

Between 1 and 20, there are 10 odd numbers and 10 even numbers, making the total number of outcomes 20. The probability of drawing an odd number is the 10 favorable outcomes divided by the 20 total outcomes. Simplifying 10/20 gives a probability of 1/2.

Keep practicing — related questions