I think both of these questions apply to SPM and IGCSE Add Math students. However, both of these question is getting from CIE IGCSE syllabus.
Permutation – 4304 – s15 – 12 -Q5
Combination – not sure is from Text book or past year paper.
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Is this available for SPM?? Why I didn't learn before
The combination one is actually O level syllabus/GCE. If you are interested it is actually 4037/N04/paper1/Question7 or in short 4037/N04/1/7
But thanks for the help tho really appreciate it. About to have exam on tuesday
Very useful classification at 11:29!
Could you please make a video about domain and range asap, as I am still confused with the topic and i have my add maths igcse tommorow