Hey students,

This is a SPM Add Math question taken from Form 4 Chapter 7 Statistics.

It’s emailed to me by one of my online student.

Here are the 2 questions.

Here’s the answer with workings.

Here’s the Video Tutorial for the Question 2. It’s in 2 parts so that the file is smaller.



PS : – If you find this tutorial to be helpful, please help to share them with your friends. Just click on the “Share on Facebook” link below.