First we find the mean (or the average)...
average : (82 + 76 + 93 + 82 + 73 + 80 / 6) = 486/6 = 81
now we subtract the average from every data point.....then square the result
82 - 81 = 1.......1^2 = 1
76 - 81 = -5....-5^2 = 25
93 - 81 = 12....12^2 = 144
82 - 81 = 1.......1^2 = 1
73 - 81 = -8.....-8^2 = 64
80 - 81 = -1.....-1^2 = 1
now we find the mean (or average) of those numbers
(1 + 25 + 144 + 1 + 64 + 1) / 6 = 236/6 = 39.33
that is ur variance....to find the standard deviation, take the square root of ur variance.....
square root 39.33 = 6.27 <==
12c - 53 = 91
First add 53 to each side. This cancels it out on the left (-53 + 53 = 0)
12c = 91 + 53
12c = 144
Now divide by 12 on each side. This cancels the 12 on the left (12/12 = 1)
c = 144/12
c = 12
Answer:
350
Step-by-step explanation:
So 25% is just basically 1/4. So multiply 1/4 by 1400 to get 350.
1/4 x 1400/1 = 1400/4 = 350
(just divided 1400 by 4 but I can't really show long division on a computer)
It’s 3/6 but you simplify it to 1/2
1/2 is ur answer :)
