Answer:
The expected values from the product of 2 marbles are 1,2,3,4,5,6,8,10,12,15,20
Step-by-step explanation:
THe expected values are 1,2,3,4,5,6,8,10,12,15,20
First distribute the -4 to the 2b and -3b. This leaves you with
Now you can distribute the 12b to b and +4. This leaves you with
Now you can combine your like terms leaving you with .
14 minutes below or 6 minutes above
Let's say Sophia's time was 10 minutes WORSE
4 minutes below average- 10 minutes= 14 minutes below average
Let's say Sophia's time was ten minutes BETTER
4 minutes below average + 10 minutes= 6 minutes above average.
Hope this helps!