The number is 5. 27-12=15/3=5 is how you get the answer.
<span>Pearson's correlation coefficient 'r' measures the degree to which two variables are correlated. The value is between -1 and 1. Negative values correspond to negative correlation (as one variable increases, the other variable decreases) whereas positive values correspond to positive correlation. The larger the absolute value of r, the closer a correlation graph resembles a set of points on the same line.
Therefore, if two variables are completely correlated, the correlation value is 1 or -1, depending on whether the correlation is positive or negative.</span>
The ratio is 11 : 7. I.e the number of red apples are 11 and that of green are 7
Answer:7
Step-by-step explanation:
21=42-3r
21-42=3r
-21=3r
r=7