3 miles X 4 times a week is =12 miles a week so 12 miles X 6 =72 miles
Answer:
Variance = 24900
Standard Deviation = 157.7973
Step-by-step explanation:
We are given the following in the question:
Number of admissions: 1000 1200 1500
Admissions Probability: 0.6 0.3 0.1
Formula:

Variance =

Thus, the variance is 24900.
Standard Deviation =

Thus, the standard deviation is 157.7973
All of the disks = 100%.
40% are red.
2/5 = 40/100 = 40% are yellow.
40% + 40% = 80%
100% - 80% = 20%
20% of the disks are blue.
20% can also be written as 20/100, which simplifies to 1/5.
1/5 of the disks are blue.
A is the answer to the question