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If a student is selected at random from a group of 10 boys and 15 girls, what is
Practice Questions
Q1
If a student is selected at random from a group of 10 boys and 15 girls, what is the probability that the student is a girl? (2023)
1/2
3/5
2/5
1/3
Questions & Step-by-Step Solutions
If a student is selected at random from a group of 10 boys and 15 girls, what is the probability that the student is a girl? (2023)
Steps
Concepts
Step 1: Count the number of boys in the group. There are 10 boys.
Step 2: Count the number of girls in the group. There are 15 girls.
Step 3: Add the number of boys and girls together to find the total number of students. 10 boys + 15 girls = 25 students.
Step 4: Identify how many of the total students are girls. There are 15 girls.
Step 5: To find the probability of selecting a girl, divide the number of girls by the total number of students. This is 15 girls / 25 total students.
Step 6: Simplify the fraction 15/25. Both numbers can be divided by 5, which gives us 3/5.
Probability
– The likelihood of an event occurring, calculated as the number of favorable outcomes divided by the total number of possible outcomes.
Basic Arithmetic
– The ability to perform simple addition and division to find totals and ratios.
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