Answer:
None of these are correct
Step-by-step explanation:
The correct answer would be 23×3
Answer:
1st option
Step-by-step explanation:
y = 1/2x + 2
Answer:
option D. Car A has the same speed as car B.
<span>n = 5
mean = 48
Let's create a series of equations to express "sum of deviations of a set of values x1 , x2 , x3 , .......... , xn , measured from 50 is -10"
(x1 - 50) + (x2 - 50) + ... + (xn - 50) = -10
(x1 + x2 + ... + xn) - 50n = -10
x1 + x2 + ... + xn = 50n - 10
And do the same for 46.
(x1 - 46) + (x2 - 46) + ... + (xn - 46) = 10
(x1 + x2 + ... + xn) - 46n = 10
x1 + x2 + ... + xn = 46n + 10
Both 50n - 10 and 46n + 10 is equal to the sum of x1, x2, ..., xn. So set them equal to each other and solve for n:
50n - 10 = 46n + 10
50n = 46n + 20
4n = 20
n = 5
Now we can calculate the sum of x1, x2, ..., xn:
50n - 10 = 50*5 - 10 = 250 - 10 = 240
And the mean
mean = 240/5 = 48</span>
15 is answer
15-9=6 and 15x6= 90