For A put 160 (division sign} 4.
For B put -40
Answer:
96
Step-by-step explanation:
Answer:
25%
Step-by-step explanation:
|×100
×100
=0.25×100
=25%
=25%error
Answer:
The answer is 66 ways .
Step-by-step explanation:
You have to use <u>Combination</u> because it says choosing 10 out of 12 as the position is not important :
12C10 = 66 ways of arrangements
The ratio of used books to new books is 9:4 because 13-4=9 and the ratio of all books to used books is 13:4 because there are 13 total books and 4 used books
