Answer:
2.0
Step-by-step explanation:
Couldn't really understnd what you wrote but I'll assume it's the standard deviation of a fair, 7-sided die
The standard deviation is just the square root of the variance (which is just the second moment minus the first moment squared)
The first moment (AKA the average is..)
The second moment is..
8.95 x 2 = 17.90
23.65 - 17.90 = 5.75
The answer is £5.75
2800 + 0.08s = 3300 + 0.06s
0.08s = 0.06s = 3300 - 2800
0.02s = 500
s = 500 / 0.02
s = 25,000 <==
Subtract 15 from 8 and you'll get if then you take 10- your answer which in this case is 7 and you get 10-7=3
hope this helpful and what you needed.
Yea u are correct I got the notes and we did the example