Answer:
A.

B.

C.

Step-by-step explanation:
Dustin has a bag of marbles with 4 blue marbles, 4 white marbles, and 3 red marbles. There are 11 marbles in total.
A. The probability that the first marble drawn is blue marble is

the probability that the second marble drawn is red marble is

The probability that the first marble drawn is blue and the second is red is

B. The probability that the first marble drawn is red marble is

the probability that the second marble drawn is white marble is

The probability that the first marble drawn is red and the second is white is

C. The probability that the first marble drawn is blue marble is

the probability that the second marble drawn is blue marble is

the probability that the third marble drawn is blue marble is

The probability that the first, second and third marbles drawn are blue is

Answer:
Rhea's estimation is unreasonable.
Step-by-step explanation:
Identify what you know:
1) Rhea calculates that she can write 1.25 pages every 2 hours
2) Rhea is calculating how long it would take her to write 6 pages.
Using Rhea's initial calculation, we can figure out roughly, how long it would take her to finish 6 pages.
First we need to divide 6 by 1.25, to figure out how many "2 hour" periods it would take Rhea.
6/1.25 = 4.8
4.8 x 2 = 9.6
It would take Rhea roughly 9.6 hours to finish 6 pages, which is 3.6 hours more than her original estimation. Thus, her estimate is unreasonable.
12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 479,001,600
I recommend you use this as a starter. I can't be completely sure if it's right. I hope it helps though! Good luck!