GCSE Secondary Maths Age 13-17 - Probability & Statistics: Frequency Tables - Finding Averages - Explained

The video tutorial explains how to determine the number of bags containing 19 buttons when given a total of 320 buttons distributed across bags with 19, 20, 21, and 22 buttons. The instructor calculates the total number of buttons in bags with 20, 21, and 22 buttons, then uses subtraction to find the remaining buttons in bags with 19 buttons. The solution involves dividing the remaining buttons by 19 to find the number of bags. The tutorial concludes with completing the table and understanding the marking scheme.

How many bags of buttons are there in total?

What is the equation used to find the number of bags containing 19 buttons?