Boy Mow Chau's answer to Wai Xuan Yi's Junior College 2 H1 Maths Singapore question.

Ask ManyTutors
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Boy Mow Chau
Boy Mow Chau's answer
316 answers (Tutor Details)
1st
note that when using normalcdf function in TI-84 GC, have to enter standard deviation, not variance.

please check for calculation errors.