Boy Mow Chau's answer to Audrey's Junior College 1 H1 Maths Singapore question.
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your mistake for (ii) is that you did not square the '2'.
read the explanation in the solution, on when you need to square & when you do not need to square.
and hooray ... in (ii), you remembered to add the variances, instead of subtract (this is commonly overlooked).
please do check for calculation mistakes.
read the explanation in the solution, on when you need to square & when you do not need to square.
and hooray ... in (ii), you remembered to add the variances, instead of subtract (this is commonly overlooked).
please do check for calculation mistakes.
Date Posted:
2 years ago
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