Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

junior college 2 | H2 Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Erin
Erin

junior college 2 chevron_right H2 Maths

Why is the answer for part i) like that? How did they derive Var (X1-X2) = Var (X1) + Var (X2) ?

Date Posted: 1 year ago
Views: 106
Jiayang
Jiayang
1 year ago
For JC i don't think the derivation is part of your syllabus.

But it's a "formula" you should know.

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Tay Zhi Yao Joel
Tay Zhi Yao Joel's answer
17 answers (Tutor Details)
1st