Answer:
C. 
Step-by-step explanation:
To find the number of black ribbons one would have subtract the amount of red ribbons from the total number of ribbons. Then one would have to express it as a proportion. Part over whole equals percent over 100. The number of black ribbons over total ribbons equals "b" over 100.
Answer:
it will be broken into 9*what ever x is
Hope This Helps!!!
Answer:
Let the number they chose be 'x'.
Result of Jane = 
Result of Elliot = 
Given that,
The product of their result = 110

It's D, because the mean doesn't matter as much if it's only taken in a small variability. The mean was selected from 25 random pages in the book, that is why it is right.