Question

Grace and Ellie are in different Geometry classes. There are only two Geometry classes at their high school. Two students are being picked to attend a special math competition, one student from each class. If there are 20 students in one class and 26 students in the other, find the probability that both Grace and Ellie will be picked to attend the competition.

Answer 1

1/20*1/26=1/520

Explanation:

You have to solve for a compound event, I had the same question and 1/23 was wrong. You take the probability on on girl being picked (1/20) and have to multiply it by the chance of the other girl getting picked (1/26)

Hope this helps :)

Answer 2

Grace and Ellie on in different Geometry classes and there are only two in the school. Two total people are going to be picked from these two classes, one from each class. One class has 20 students, the other has 26 students so in total there are 46 students and two of these are going to be picked. Therefore 2/46 of these kids are going to be picked which is the answer considering both students are in different classes.

Final answer: 2/46 or 4.3% of the time.