GCSE Secondary Maths Age 13-17 - Probability & Statistics: Frequency Tree - Explained

The video tutorial explains how to use a frequency tree to analyze a homework completion problem among 100 students, including 42 boys and 58 girls. It details the process of calculating the number of students who did and did not complete their homework, and how to determine the probability of a randomly chosen girl not doing her homework. The tutorial emphasizes careful reading and analysis of the given information to solve the problem accurately.

How many girls are there among the 100 students?

• 58

• 53

• 8

• 42

How many students did not complete their homework?

• 8

• 53

• 5

• 3

How many boys completed their homework?

• 39

• 42

• 3

• 58

What is the probability that a randomly chosen girl did not do her homework?

• 3/42

• 5/58

• 8/100

• 53/58

What is the key step in solving the probability question?

• Focusing only on the girls

• Counting the total homework submissions

• Identifying the number of boys

• Calculating the total number of students