Solution: We are given below data:
Now to find the mean deviation, we use the below formula:
Where:
represents the summation
X, represents the observation.
represents the mean
N represents the number of observation.
Therefore, the mean deviation is:
= 4
The ratio of boys to girls is
5:6
So if we do that for 385 students the ratio would show 462 girls
Pls give me a brainliest if this helped thx
Answer:
12
Step-by-step explanation:
Answer: 
Step-by-step explanation:
subtract by terms.
2x^2 - 7x^2 = -5x^2
-5x is the only term so leave it alone
-7-3= -10
-5x^2 -5x -10
