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 days challenge assignment. What is the probability that both students are girls?

Answer 1

Answer:

The probability that both students are girls is 0.15.

Step-by-step explanation:

Total number of students = 15 + 10 = 25

Number of girls = 10

Number of ways to select 2 students = ${25\choose 2}=\frac{25!}{2!(25-2)!} =300$

Number of ways to select 2 girls = ${10\choose 2}=\frac{10!}{2!(10-2)!} =45$

Compute the probability of selecting two girls as follows:

$P(2\ girls)=\frac{45}{300}=0.15$

Thus, the probability that both students are girls is 0.15.

Answer 2

Answer:

3/20

Step-by-step explanation: