Numbered Balls
Problem of the Week - March 01, 2021
Nine balls numbered 1-9 are placed in a jar. If three balls are drawn at random, without replacement, what is the probability that the sum of the numbers on the balls is odd?
Immediately after your correct answer is submitted, your name will be posted here.
Past problems
Individual Monthly & Annual Rankings
Leaderboard Monthly & Annual Rankings
Custom Leaderboards Are Here!
Take the competition to the next level and encourage participation by creating custom leaderboards for your students or friends to join. Click below to try it out now!
Need Scratch Paper?
We encourage you to use the free online math software and mobile app from ClassPad as your digital scratch paper while solving the problems on our site!
