Question

2. Find the number of permutations in the word arithmetic. REALLY EASY! Am I right?

A. 3,628,800 --MY CHOICE
B. 907,200
C. 834,200
D. 700,123


3. Find the number of permutations in the word "circus".

A. 360
B. 720 - MY CHOICE
C. 980
D. 1023


4. In how many ways can a teacher arrange 4 students in the front row of a classroom with a total of 30 students?

A. 557,720
B. 657,720 -- MY CHOICE
C. 457,720
D. 357,720

Answer 1

#2

that answer is only true if you do not have any duplicate letters (but you do, you have 't' and 'i', two copies of both)

Answer 2

# 3

same story, 720 would be the answer, but you have two copies of 'c'

Answer 3

# 4 is correct

Answer 4

yes

Answer 5

do you know how to account for the duplicates?