Could I have some help with part
(c) and
(d)?
See Attachment.
Answers:(a) 1/2 * 1/2 * 1/6 * 1/6 = 1/144 (confirmed)
(b) 1/2 * 1/2 * 5/6 * 1/6 = 5/144 (confirmed)
(c) To make 13 points: Can be 5, 5, 3 (arranged in 3 different ways) or 5, 4, 4 (arranged 3 ways)
i.e.
(1/144 * 1/144 * 5/144 * 3) + (1/144 * 1/144 * 1/144 * 3) = 1/165888
TEXTBOOK ANSWER: 7/995328
(my answer is technically 6/995328. What did I miss :C?)
(d) Not sure what the quickest approach is (or any at all) to get their answer.
I did:
either 5,5,5 or 5,5,4 (to beat 13, assuming that's what they meant)
P(5,5,5 or 5,5,4 points) = (1/144 * 1/144 * 1/144) + (1/144 * 1/144 * 1/144 * 3) = 1/746496
TEXTBOOK ANSWER: 3/144 (prob wrong this one)
If a short cut is possible using 3U, I would also like to know
.
Thank you!