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In a class of 30 students, 18 are girls. If a student is selected at random, wha
In a class of 30 students, 18 are girls. If a student is selected at random, what is the probability that the student is a boy?
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In a class of 30 students, 18 are girls. If a student is selected at random, what is the probability that the student is a boy?
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The number of boys is 30 - 18 = 12. The probability is 12/30 = 0.4.
Questions & Step-by-step Solutions
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Q
Q: In a class of 30 students, 18 are girls. If a student is selected at random, what is the probability that the student is a boy?
Solution:
The number of boys is 30 - 18 = 12. The probability is 12/30 = 0.4.
Steps: 5
Show Steps
Step 1: Identify the total number of students in the class, which is 30.
Step 2: Identify the number of girls in the class, which is 18.
Step 3: Calculate the number of boys by subtracting the number of girls from the total number of students: 30 - 18 = 12.
Step 4: Write the probability of selecting a boy as the number of boys divided by the total number of students: 12/30.
Step 5: Simplify the fraction 12/30 to get 0.4.
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