1+1+1+1+1+5+5+5+5 is one
5+5+5+1+1+1+1+1+1+1+1+1+1 is another
5+5+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 is three
5+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 is four.
There are 4 combinations.
The part you don't need is "there are 10 periods in all during a week" because once you read the first two sentences you can tell you just need to do 24 x 2 which equals 48.
*Hope i helped :D
Answer:
Step-by-step explanation:
3/5 ÷5/7= 21/25
Answer:
2.7
Step-by-step explanation:
I don't know how to but its correct