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

Practice Questions

Q1
In a class of 30 students, 18 are girls. What is the probability of randomly selecting a boy? (2021)
  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 of randomly selecting a boy? (2021)
  • 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 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: 12 / 30.
  • Step 6: Simplify the fraction 12 / 30 to its simplest form, which is 2 / 5.
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