#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
#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:= SIX DIGIT of your RUID
How many walks in Manhattan are there (not using bdway) from the corner of min(a,b) St and min(c,d) Ave to max(a,b) St and max(c,d) Ave walking in the positive direction. 

A1. MY ANSWER TO THE FIRST ATTENDANCE QUESTION IS:
RUID: 178000194
a:=1
b:=7
c:=0
d:=0

min(1,7)=1, min(c,d)=0
max(a,b)=7, max+c,d)=0
The number of walks in the positive direction from (1,0) to (8,0) is 1.

Q2. THE  SECOND ATTENDANCE QUESTION WAS:
Consider your RUID as a word of LENGTH 9 in the 10-letter "alphabet" {0,...,9}. How many ways to rearrange your RUID?  

A2. MY ANSWER TO THE  SECOND ATTENDANCE QUESTION IS:
RUID: 178000194
9!/(3!*2!)=30240