Submitted by Anonymous on Mon, 09/26/2016 - 09:05
Forums:
Hi - these two are now published. Do please use the forum if you have any questions on any of the assignments.
Question 4ii on Assignment 6 is an interesting one - it shows that, even when you have a "very accurate" blood test, the chances of you having a disease if you test positive for it can be quite low.
Have fun!
Question 3(b)
Picture 10 dots: ..........
How many different ways could you cover four of the dots with vertical lines, eg: .|..|.|.|.
Why does this give the right answer? How could you use this to figure out the number of five digit numbers that sum to other totals? Are there any totals this approach wouldn't work for?
interesting...
I think I need to think a bit harder about this...
For the number of five digit
For the number of five digit numbers that add to 43, how many different ways can we cover up 6 dots ...... with 4 vertical lines (eg ||.|.| represents 99889). 6C4 = 15.
4ii
Hi I'm really struggling with part 4ii of Assignment 6 - I keep getting 9.9/11.7 as the probability - I can't seem to see why that's wrong
4ii
No worries - problem now sorted
Geat!
:-)