Answer:
therefore they sell 30 pens.
Step-by-step explanation:
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
From the second figure it can be seen that 25 + 144 = 169
This implies that 5^2 + 12^2 = 13^2
This is a right triangle with legs of 5 and 12 and hypothenus of 13.
(To any other people, please correct me if I'm wrong) I believe that the answer would be at the rate of 24.4 miles per gallon