Let neeti age=n
and yash age = y
then n/y =4/3
so n=4y/3
similarly
n+y=28
putting value of n
4y/3+y=28
(4y+3y)/3=28
7y/3=28
y=28*3/7
y=4*3=12
so y=12
n=4y/3
n=4*12/3
n=4*4=16
so ages
yash=12
neeti=16
after 8 years
yash=12+8=20
neeti=16+8=24
neeti/yash = 24/20
neeti/yash =6/5
Answer:
B AND F
Step-by-step explanation:
!!!!!!!!
Just do 6 x 0.2 to reverse the division
So the answer is 1.2
I think
The value of correlation coefficient (r) for the dataset is 0.981
<h3>What is correlation coefficient (r)?</h3>
The correlation coefficient (r) is used to determine the closeness and association of a scatter plot points.
The dataset is given as:
- x: 8 15 3 7 2 14
- y: 15 21 6 12 3 20
Using a graphing calculator, we have the following parameters:
<h3>X Values
</h3>
- ∑x = 49
- Mean = 8.167
- ∑(X - Mx)2 = SSx = 146.833
<h3>Y Values
</h3>
- ∑y = 77
- Mean = 12.833
- ∑(Y - My)2 = SSy = 266.833
<h3>X and Y Combined
</h3>
- N = 6
- ∑(X - Mx)(Y - My) = 194.167
The correlation coefficient (r) is then calculated as:
This gives
![r = \frac{194.167 }{ \sqrt{((146.833)(266.833))}}\\](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7B194.167%20%7D%7B%20%5Csqrt%7B%28%28146.833%29%28266.833%29%29%7D%7D%5C%5C)
![r = 0.9809](https://tex.z-dn.net/?f=r%20%3D%200.9809)
Approximate
![r = 0.981](https://tex.z-dn.net/?f=r%20%3D%200.981)
Hence, the value of correlation coefficient (r) for the dataset is 0.981
Read more about correlation coefficient at:
brainly.com/question/4219149