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In a class of 30 students, 18 are girls. What is the probability that a randomly

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Question: In a class of 30 students, 18 are girls. What is the probability that a randomly selected student is a boy?

Options:

  1. 3/5
  2. 2/5
  3. 1/2
  4. 1/3

Correct Answer: 2/5

Solution: 

Number of boys = 30 - 18 = 12. Probability of boy = 12/30 = 2/5.

In a class of 30 students, 18 are girls. What is the probability that a randomly

Practice Questions

Q1
In a class of 30 students, 18 are girls. What is the probability that a randomly selected student is a boy?
  1. 3/5
  2. 2/5
  3. 1/2
  4. 1/3

Questions & Step-by-Step Solutions

In a class of 30 students, 18 are girls. What is the probability that a randomly selected student is a boy?
  • Probability Calculation – Understanding how to calculate the probability of an event based on the ratio of favorable outcomes to total outcomes.
  • Complementary Counting – Using the total number of students to find the number of boys by subtracting the number of girls from the total.
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