Question

Mr. Garcia has 15 boys and 10 girls in his math class. He selects two students at random to demonstrate how they solved the day’s challenge assignment. What is the probability that both students are girls?

Answer 1

3/20.

Explanation:

Answer 2

`(3)/(20)`

Explanation:

If there are 15 boys and 10 girls, then there are 25 students in total. The probability of choosing a girl immediately would be
`(10)/(25)`. There would then be one less girl and one less person, so the chance of choosing another girl would be
`(9)/(24)`. We multiply these to get
`(10)/(25)*(9)/(24)=(2)/(5)*(3)/(8)=(3)/(20)`.