#ATTENDANCE QUIZ FOR LECTURE 2 of Dr. Z.'s Math454(02) Rutgers University

# Please Edit this .txt page with Answers

#Email  ShaloshBEkhad@gmail.com 
#Subject: p2
#with an attachment called
#p2FirstLast.txt
#(e.g. p2DoronZeilberger.txt)

#Right after finishing watching the Second lecture but no later than Friday, Sept. 11, 2020, 8:00pm




Q1. THE FIRST ATTENDANCE QUESTION WAS:   Let a:=FIRST DIGIT of your RUID, let B:=SECOND DIGIT of your RUID, let c:= FIFTH DIGIT of your RUID, let d:= SIXTH DIGIT of your RUID  #HOW MANY WALKS IN MANHATTAN ARE THERE (Not using Broadway) (From the corner of min(a,b) st and min(c,d) ave to max(a,b) st and max(c,d) ave?
# my ruid is 192002142, so from min(1,9) = 1 st and min(0,2) = 0 ave   (1,0)   to  max(1,9) = 9 st and max(0,2) = 2 ave   (9,2)
#Find walks from (1,0) to (9,2) only moving in positive direction


A1. MY ANSWER TO THE FIRST ATTENDANCE QUESTION IS:  10 choose 2 = 45 walks




Q2. THE  SECOND ATTENDANCE QUESTION WAS: CONSIDER YOUR RUID AS A WORD OF LENGTH 9 IN THE 10-letter "ALPHABET" {0,1,2,...,9}, HOW MANY WAYS TO REARRANGE YOUR RUID?


A2. MY ANSWER TO THE  SECOND ATTENDANCE QUESTION IS: 9! / (2! * 2! * 3!) = 15120