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

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Question: In a class of 30 students, 18 are girls. What is the probability of randomly selecting a boy? (2021)

Options:

Correct Answer: 2/5

Solution:

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

In a class of 30 students, 18 are girls. What is the probability of randomly selecting a boy? (2021)

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.

Probability – The likelihood of an event occurring, calculated as the number of favorable outcomes divided by the total number of outcomes.
Basic Arithmetic – The fundamental operations of addition, subtraction, multiplication, and division used to calculate the number of boys and the probability.