Group testing

Have you ever played a game where you have to guess who is hiding a certain object? Sometimes it's hard to guess just by looking at one person, right? Well, group testing is kind of like a game where we try to find out who has something without testing each individual separately.

Let's say we have a class of 30 students and we want to see who has the flu. Instead of testing each student individually, which would take a long time and be expensive, we can group them into smaller groups. We will take some of the students and put them into a group, and then test the group as a whole. If the group tests positive for the flu, we will know that at least one of the students in the group has it. If the group tests negative, we know that none of the students in the group have it.

Next, we can take another group of students, which may or may not include some of the students from the first group, and test them. Depending on the results, we can narrow down the students who have the flu without having to test every single one.

Group testing helps us save time and resources while still getting accurate results. It's like playing a fun game of guessing, but with a serious purpose – to keep people healthy!