If a student is selected at random from a group of 20 students, where 8 are girls, what is the probability that the selected student is a boy?

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Q: If a student is selected at random from a group of 20 students, where 8 are girls, what is the probability that the selected student is a boy?

Solution: The number of boys is 20 - 8 = 12. The probability of selecting a boy is 12/20 = 3/5.

Steps: 6

Step 1: Identify the total number of students in the group. In this case, there are 20 students.
Step 2: Identify the number of girls in the group. Here, there are 8 girls.
Step 3: Calculate the number of boys by subtracting the number of girls from the total number of students. So, 20 - 8 = 12 boys.
Step 4: Write down the total number of boys, which is 12.
Step 5: To find the probability of selecting a boy, divide the number of boys by the total number of students. This gives us 12/20.
Step 6: Simplify the fraction 12/20. Both numbers can be divided by 4, resulting in 3/5.