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If a student is selected at random from a group of 20 students, 12 of whom are b
If a student is selected at random from a group of 20 students, 12 of whom are boys, what is the probability that the student is a girl?
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If a student is selected at random from a group of 20 students, 12 of whom are boys, what is the probability that the student is a girl?
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Number of girls = 20 - 12 = 8. Probability = 8/20 = 2/5.
Questions & Step-by-step Solutions
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Q
Q: If a student is selected at random from a group of 20 students, 12 of whom are boys, what is the probability that the student is a girl?
Solution:
Number of girls = 20 - 12 = 8. Probability = 8/20 = 2/5.
Steps: 5
Show Steps
Step 1: Identify the total number of students in the group. There are 20 students.
Step 2: Identify the number of boys in the group. There are 12 boys.
Step 3: Calculate the number of girls by subtracting the number of boys from the total number of students. This is 20 - 12 = 8 girls.
Step 4: To find the probability of selecting a girl, divide the number of girls by the total number of students. This is 8 girls / 20 total students.
Step 5: Simplify the fraction 8/20. Both numbers can be divided by 4, which gives us 2/5.
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