Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 4 | E Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Ans- a)4/15, 3/5, 11/15 & b)4/15 do help with prob diagram too thanks! ^^
Date Posted: 7 years ago
Views: 856
See 1 Answer
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
In part (a)(i), 2/6 refers to a girl staying on A or C room on a particular floor while 1/5 refers to the other firl staying on B room of that floor. Multiply by 2 twice refers to the two girls being interchangeable and there are 2 floors in the hotel.
Part (b) is conditional probability where 4/15 divided by 2 refers to the two girls staying next to each other on the second floor only and the divided by 1/2 refers to the condition that Kate is already on the second floor.
Part (b) is conditional probability where 4/15 divided by 2 refers to the two girls staying next to each other on the second floor only and the divided by 1/2 refers to the condition that Kate is already on the second floor.
Date Posted:
7 years ago
360 Tutoring Program