The table shows the probability of how a certain score will compare to a listed score on a popular video game. Use the probability distribution to find the variance, o^2 A- 406.4
B- 20.0
C- 400.0
D- 2.5

B- 20.0

Step-by-step explanation:

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4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.